A failed asylum seeker from Syria killed himself and injured 12 other people after setting off a bomb outside an open-air music festival in the German city of Ansbach, officials say.Bavaria’s interior minister said the 27-year-old man had detonated his device after being refused entry to the festival in the southern city.About 2,500 people were evacuated from the festival site after the explosion. It is the third attack in the state of Bavaria in a week, reports BBC.A shooting rampage in Munich on Friday left nine dead while an axe-wielding teenager was shot dead after injuring several people on a train a week ago in Wuerzburg.Bavarian Interior Minister Joachim Herrmann said the explosion happened at about 22:10 (20:10 GMT) near the entrance to the music festival.The suspected attacker had entered Germany two years ago and had his asylum claim rejected a year ago, Mr Herrmann said.He had been given leave to stay temporarily given the situation in his home country and provided with an apartment in Ansbach, he added.The minister said he was ‘incensed’ by the attack, which he said demonstrated the need ‘to strengthen controls on those we have living in our country’.Initial reports had suggested the blast might have been a gas explosion.