**Police have arrested a man after a number of children were injured in an attack at a German school.**The Carolinum secondary school in the Bavarian town of Ansbach was evacuated after the incident.
Four children were reportedly wounded in the attack, but none of the injuries was thought to be life threatening.
In March, 17-year-old Tim Kretschmer opened fire on pupils and teachers at his former school in Winnenden, south-west Germany, killing 15.
In Thursday morning’s incident, police were alerted after reports of shots being fired inside the school.
Local fire services were quoted as saying the attacker was armed with petrol bombs.
But police have been unable to confirm media reports that the attacker had lobbed the devices into a classroom.
Police are currently searching the school.
Germany suffered its worst-ever school-shooting in 2002 when a former pupil at a school in the eastern city of Erfurt killed 14 teachers, two pupils and a police officer.