When the Second Intifada began, Israel started with the systematic destruction of security service's offices until 90% of them were destroyed by 2003, and about three-quarters of the national security officers were locked up in Israeli detention camps, others were killed. Israeli attacks were mainly concentrated on Palestinian security forces, even though Hamas was responsible for a majority of the bombings and shootings."In 32 months of fighting, the Israeli military had mainly attacked Palestinian security forces, even though Hamas was responsible for a majority of the bombings and shootings."</ref> The siege of Arafat's compound, which started in March 2002 during Operation Defensive Shield was maintained in 2003 and 2004, until Arafat died in a mysterious way.