A bomb exploded in a Johannesburg building housing a private group that sends gifts to South African soldiers. The banned African National Congress, the main rebel group fighting white rule in South Africa, claimed responsibility. No one was reported hurt by the blast, which damaged several nearby offices and shops. Police said the apparent target was the Southern Cross Fund, which provides food packets for soldiers stationed along South Africa’s borders. The explosion came two days after a bombing at a military clinic, for which the rebel group also took responsibility.