Assailants have detonated a bomb outside a popular cafe in Gaza City in what appears to be part of an extremist campaign against targets seen as signs of Western influence.
There were no casualties in Sunday's explosion, but the blast smashed the cafe's windows and damaged its door.
Owner Khalid Harbid said another bomb went off outside his cafe last month. He blames Gaza's Islamic Hamas rulers for not protecting his business.
A Hamas official said only that police are investigating. On Friday, assailants detonated a bomb outside a Christian school, causing no injuries.
Over the past two years, Muslim extremists in Gaza have detonated bombs near cafes, hairdressers, record stores and institutions linked to the area's tiny Christian community.