RABAT—A Moroccan man detonated explosives he was carrying under his clothes at an Internet cafe in Casablanca overnight, killing himself and wounding three other people, security sources and witnesses said on Monday.
Government security officials said they were investigating whether it was a militant suicide bombing.
Few other details were immediately available.
The blast triggered alarm among security officials as it occurred in the commercial capital's Sidi Moumen slum, home to 13 suicide bombers who killed themselves and 32 other people in 2003.
Morocco is on high alert after a string of bomb attacks last month in neighbouring Algeria.
Governments in North Africa fear violence may spill over from Algeria after the Salafist Group for Preaching and Combat renamed itself Al Qaeda organisation in the Islamic Maghreb with the aim of fusing similar Islamist groups groups together.
Last week, security sources said police had arrested the head of the military wing of the Moroccan Islamic Combatant Group (MICG).
Police suspect Saad Houssaini, 38, of involvement in the 2003 Casablanca bombings and also in the 2004 train bombings in Madrid that killed 191 people.
Security experts believe the MICG is one of the small militant factions to have joined the al Qaeda group.
Security sources said police were hunting for suspected al Qaeda members who may have infiltrated from Algeria.
Morocco has backed the U.S.-led war against terrorism launched after the Sept. 11, 2001 attacks on the United States.
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