In pictures: Jerusalem campus bombing

At least seven people were killed and 70 injured in a bomb blast in Jerusalem's Hebrew University on Wednesday.

Many of the wounded are in critical condition, and there are fears the death toll will rise

Hamas claimed to be behind the blast, which it said was in retaliation for an Israeli air raid earlier this month

It was a busy time of year, with Israeli, Arab and foreign students all on campus

Witnesses described scenes of horror in the moments after the bombing, with people wailing, covered in blood

It is not yet known if it was a suicide attack or if the bomb was left in the cafeteria