Militants escort Abu Obeida Militants escort Abu Obeida , a spokesman for Hamas's armed wing the Ezzedine Al-Qassam Brigades, as he arrives to hold a press conference in Gaza City on June 04, 2009. four people were killed in a West Bank shoot-out on June 04 during an arrest operation for a senior Hamas militant, deepening the rift between the rival Palestinian factions. The Islamist Hamas movement ruling the Gaza Strip warned that the rival Fatah movement loyal to president Mahmud Abbas had crossed a 'red line' by carrying out the operation which killed two of its members.photo by Thaer alhasani/propaimages.