At least one person was killed and 25 others were injured on Friday in clashes between angry youngsters protesting against an anti-Islam film and security forces in Lebanon's northern port city of Tripoli.

The protesters in front of a KFC restaurant hurled stones at security forces who tried to disperse the crowd, setting the restaurant on fire, the National News Agency reported.

A number of worshipers also gathered in Tripoli after Friday prayers, waving black flags and calling to expel the US ambassador to Lebanon.

Similar gatherings were also held in Lebanon's cities of Taalabaya and Zahle following the prayers to protest against the movie that sparked a spate of protests in Arab and Islamic countries.

Meanwhile, a series of security incidents erupted in the city's main streets during the protest which is against the alleged US- made movie that insults Islam and Prophet Mohammed.

Internal Security Forces shot stray bullets to disperse protesters and firefighters were dispatched to put out the blaze.