Spanish police have arrested four Moroccans suspected of having direct links to last year's Madrid commuter train bombings that killed 191 people.

An Interior Ministry statement says police detained the four Tuesday in a Madrid suburb.

It says the four, all members of the same family, are believed to have ties to Morocco's Islamic Combat Group, an al-Qaida-linked movement blamed for bombing attacks in November 2003, in Casablanca, Morocco, that killed 45 people.

Police also say they issued an international arrest warrant for another Moroccan, Youssef Belhadj, who currently lives in Belgium. Spanish authorities say they believe the suspect appeared on a videotape claiming that al-Qaida had carried out the attacks on four Madrid commuter trains, which also wounded about 1,900 people.

Some information for this report provided by AP and Reuters.