The Ynet news agency is quoting a Palestinian security source that the Palestinian Authority has arrested 170 Hamas men in the West Bank over the past few days, in connection with a series of shooting attacks against Israelis in the West Bank that killed two Israelis. The report said that the Palestinian security services believe that Hamas is behind the shootings. The spokesman for the PA security forces, Adnan Damiri, said Hamas is trying to undermine the security situation in the West Bank at the same time they are holding talks with Israel about a long-term ceasefire. Hamas has denied any talks. Hamas condemned the wave of arrests and threatened that it could attack the PA if the arrests continue. The PA and Hamas signed an agreement for a unity government last year that would lead to new elections, but it never got off the ground and the latest events show that tensions between the two rival Palestinian groups are increasing.