Alex who was finally free from the two, started to go to the place where he hid his weapons, but while he was walking he felt someone following him. He was hearing the slight sound of footsteps right behind him it was two pairs of feet. The two that were following were pretty good, and of course Alex could guess who the two of them were.
It was possible to simply let them follow him and show them were he hid all his equipment, but Alex wanted to keep the places where he hid his equipment a secret. If more than one person knows of their location then it was possible that even more people will find out. It was at that moment Alex decided to escape from them.
Oliver and Matthew who were silently following Alex, saw him suddenly run. They knew that they were somehow spotted by Alex, so in the end they didn't hide anymore and tried to follow Alex. Yet the moment they turned in one corner Alex suddenly disappeared.