On Sunday, March 14, 2004, two Palestinian suicide bombers wearing explosive belts hidden beneath their clothing approached the Port of Ashdod in Ashdod, Israel. Despite substantial security measures at the port compound, the two men were able to infiltrate the site. At approximately 16:20, they detonated their explosive devices in close succession — one inside an office building within the compound, and the other, moments later, at the compound's entrance.
The combined force of the two blasts killed ten civilians, most of whom were port workers, and injured sixteen others.
Hamas and Fatah jointly claimed responsibility for the attack, stating it had been carried out by two 18-year-old men from the Jabalya refugee camp in the Gaza Strip. According to this claim, the two assailants had infiltrated Israel from Gaza by concealing themselves inside a shipping container that passed through the Karni Crossing.
A Hamas leader in Gaza said the original plan had been for the bombers to target fuel tanks at the port. Israeli officials stated that the bombers had intended to carry out a "mega attack" causing hundreds of casualties, but instead detonated their devices hundreds of meters short of the fuel tanks. It was later reported that the attack had been financed and directed by Nizar Rayan.
In response to the bombing, Hamas founder Ahmed Yassin was killed, along with his bodyguards and several bystanders — eleven people in total — in an Israeli helicopter strike using hellfire missiles fired at his wheelchair in Gaza City.