Yemeni police have reported that about 30 people have been killed and more than 50 injured in an explosion near a police college in Yemen ' s capital Sanaa.The blast, which was caused by a car bomb that exploded near the college, was heard across Sanaa and caused a fire, witnesses reported. it targeted a group of students standing near the building. Photographs published by witnesses on social media show the wreckage of the vehicle and bloodied bodies on the street. Ambulances took the wounded away from the area. No one has claimed responsibility for the attack yet. SinceAl - Qaeda in the Arabian Peninsula(AQAP)has been recentlyvery active in Yemenby staging a great number of terror attacks, it is presumed that the terrorist group is responsible for the explosion. Neighboring nations are concerned of AQAP gaining power to expand its terror attacks outside Yemen. The country has been increasingly in danger of terrorist organisations since the 2011 popularuprising that ousted President Ali Abdullah Saleh.READ MORE:Yemen on alert over received tips of al - Qaeda plots