GAZA, Aug 7 (Reuters) - Palestinian militants exploded a bomb outside a major security compound occupied by Hamas forces in Gaza on Tuesday, the first such attack on the Islamic group since it seized the coastal strip in June, officials said.

No one was injured in the blast, security sources said.

Officials said that the bomb was thrown into a garbage container from a vehicle that drove by the compound, which was once a headquarters of President Mahmoud Abbas's Fatah forces.

Hamas routed Fatah security forces in Gaza in a brief civil war and took control of the enclave on June 14.

"We are trying now to track the vehicle and uncover the identities of the attackers," Islam Shahwan, a spokesman from Hamas's Executive Force, told Reuters.

Security officials said that no group claimed responsibility for the attack.

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