Seventeen students were injured on Sunday in a hand grenade attack on a school in Afghanistan's Faryab province, 425 km north of capital Kabul, interior ministry said in a statement. "A terrorist on a motor bike hurled a hand grenade in front of entry gate of a boys' school named Ali Shirnawai, in third district of provincial capital Maimana city, at around 12:30 p.m. (local time) Sunday. As a result 17 students were injured," said the statement. The statement said the attack occurred when the students were leaving the school building, adding that two students were in critical conditions.