Everyone standing in front of the surveillance wall was silent, except for sighing and sighing, and it was impossible to guess what those attackers were based on inference, so they could only put their hope on the macro detectives who were there to investigate.

It wasn't until midnight that the detectives who were searching in the building made a discovery and found several bundles of silver iron arrows, which were the same kind of iron arrows that had attacked them before.

Wang Yi and the others were even surprised when they saw the iron arrows they found in front of the monitoring wall, but they still didn't find the attacker.

Wang Yi asked Hongzhen with a communication: "Have you seen anything else in the place where the iron arrow was found?"

In the video, the macro detective pointed to a bundle of iron arrows placed in front of the windowsill and said, "That's all."

"Are there any footprints or something?"

"Nope."

Wang Yi was stunned for a moment, and then asked, "You can take a picture of the details of the situation in that room for me."

"Yes."

The footage of the video began to show other places, other walls in that room, tables, chairs, sofas, and so on.

Chen Feng, who was also watching the video, said: "There doesn't seem to be anything abnormal here."

"Bundles of iron arrows were found there, so it's likely a point of attack." Wang Yi guessed: "Then what is there to attack with iron arrows?"

Xu Mengyi accosted: "According to the analysis just now, it's not a human, it's not a ghost, it's not a machine, it's not a member of the Heavenly Dao Society, could it be that the iron arrow attacked by itself?"

Xu Mengyi quickly noticed that everyone was looking at him with idiot eyes, and said embarrassedly: "Just kidding, I want to say that if it's really not those things, then there is really no other possibility, so the attacker is likely to be one of them."

"Which one do you think?" Wang Yi asked.

Xu Mengyi concluded: "It's either a human being or a ghost."

Wang Yi asked, "What do you say about the elemental breath?" How could it be that you couldn't sense their elemental aura? ”

Xu Mengyi hypothesized for this: "Is there such a possibility, that is, the attacker is indeed unable to hide his elemental aura, but he can teleport and teleport to a far place, far beyond the sensing distance of the scout, in this case, the scout will also not be able to sense their elemental aura." Also, the scouts were only searching a small area, and the attackers might have taken refuge elsewhere. ”

"Sounds a bit logical, but who has the ability to teleport?"

Wang Yi turned to look at Xu Wu beside him as he spoke, and asked him if he had seen or understood ghosts with teleportation abilities.

Xu Wu gave a negative answer to this.

Wang Yi looked at Xu Mengyi again and said, "It seems that the possibility of teleportation is not very large."

Mi Xue guessed: "Could it be that there are some mechanisms in those buildings, such as hidden passages and the like, which can allow attackers to move down vertically, and the underground of those buildings seems to have not been checked."

Wang Yi felt that Mi Xue's statement seemed to be more reliable, glanced at the others, and said, "What do you think?"

"Do we still need to do that?" Xu Mengyi said simply: "Chabei."

Wang Yi immediately issued a new order to the Hongzhen and them, ordering them to carefully search the buildings and their undergrounds.

The Silent Whisperers' elemental aura sensing distance is one kilometer, which means that if there is an attack under the building, the attacker must be at least one kilometer away from the ground.

It is unclear whether the attackers were able to hide that deep underground, but it is not difficult for the Silent Whisperers to probe a kilometer underground.

Detective Macro flew out of the building with his reconnaissance team, then swooped down to the surface below and began to drill underground, with six of the Silent Whisperers on guard at the drill site.

Nearly a quarter of an hour later, the Whisperers who had gone underground sent back reconnaissance information, still not sensing the elemental aura of the other ghosts or the living.

Wang Yi no longer had any thoughts after listening to Hongzhen's reply, moved to the chair, and sighed: "I can't help it, if any of you still have ideas, talk about it."

Xu Mengyi stepped forward and said, "They didn't find a secret passage underground."

"Nope." Wang Yi listened to what Hong Detective said very clearly, and described: "They only drilled down for a kilometer, and sensed the surrounding elemental aura at that point, but it already explained the problem."

"Not necessarily." Xu Mengyi hypothetical: "What if the dark passage is not vertically down? Just went down vertically for a while, and then horizontally to other places. ”

"Then you mean to find out if there is a secret passage?"

"Nope." Xu Mengyi moved up the holographic screen, and then projected a map of Nanhong City, pointed to the area they were searching and said: "At present, they are only searching for the West District, and it is only a small part of the West District, I want to say whether to expand the search area, including the underground."

Wang Yi thought to himself that there seemed to be only this way at the moment, so he informed him of it to Hong Zhen, and asked him to watch and arrange the search of the entire Nanhong City.

The macro detective on the other end of the communication began to contact other reconnaissance teams, and quickly arranged a comprehensive search for the western district of Nanhong City, and then moved to other areas after the search of the western district.

Wang Yi asked Hongzhen again when they were acting according to the new arrangement: "Report the remaining situation of your Yuan Force."

"Back to the sir, almost all of them are around forty percent."

"Forty percent." Wang Yi muttered, and then said: "In this way, you can rest for a while, when to move, I will inform you then."

"Yes."

Hong Detective immediately issued an order to the reconnaissance teams to rest in place.

Wang Yi then said to the others beside him: "The scouts don't have much remaining Yuan Power, they can only come here today, let them rest first, we should rest too, and the duty will come according to our previous arrangement."

Xu Mengyi said briskly: "You go to rest, come for me early."

"Oh Ka."

Chen Feng pointed to the monitoring wall and said, "Do you want to take another look?"

"Macro detectives have stopped scouting, what are they looking at?" Wang Yi asked rhetorically.

"Take a look at the videos they just made and see if they can find something of value out of them."

"There's no need for this, let's take a good rest and rest, and there may be a surprise when we wake up."

Chen Feng agreed: "It's okay."

Soon only Xu Mengyi was left in front of the monitoring wall, as well as Xu Wu and their ghost soldiers.

The scouts in Nanhong City also rested in place to recover the Yuan Force that had been consumed.

Xu Mengyi walked to the material storage area to find some snacks, then returned to the monitoring wall, and put his holographic screen on the monitoring wall, and played a movie on the holographic screen, while enjoying snacks while observing the pictures on the monitoring wall and the holographic screen.