Lightning Fast Attack!

The nine rollerbladers moved around the maze for a long time before they stopped practically together. 

Three of them stopped at a gambling site, monster coliseum, and illegal black market, which were places that had a lot of people. Good and bad people were there, and the atmosphere was foul. Someone might appear at any moment to take their backpacks. 

Another three stopped at alleys with really narrow entrances. These areas would only be able to accommodate two people inside. The air above the alleys was sealed shut by illegal buildings, so they could not monitor them from above or tail them. 

The last three shot into buildings that looked like mazes. 

Then, thick, black smoke gushed out of the nine people at the same time. 

Smoke bombs!

The large outdoor survival backpacks they carried contained a large amount of smoke bombs.