These all five men are US Nationals caught in Surgodha, are suspected to indulge in terror activities in Pakistan. They arrived in Pakistan few days back and are being linked to possible terror attempt by them. Some maps of locations around South Waziristan were also secured from them.
Police had arrested them after getting an intelligence report about them, a joint investigation team has been formed which will investigate about their meetings with people inside Pakistan and will come up with final report about them. Pakistan and US governments are already in contact with each other about this matter and US President promised an investigation about how and why they left US for Pakistan few days back.