 Shaer was first arrested at his home in Ramallah by Israel Defense Forces personnel on August 19, 2006, and was the highest-ranked of about sixty Hamas officials detained by Israel during the 2006 Israel-Gaza conflict.He was released without charges September 27 after a military court ruled that there was insufficient evidence against him to justify his arrest.Shaer was detained again on May 23, 2007 at his home in Nablus by the IDF during overnight raids in the West Bank relating to the Qassam rocket fire towards Israel from Hamas in the Gaza Strip.