KARACHI, Pakistan - A suicide bomber killed at least one person when he rammed his vehicle into the gates of a military base in Pakistan's largest city on Thursday, police said, the latest in a series of audacious attacks on security forces.

Thirteen people were wounded in the explosion but the attacker was unable to penetrate into the headquarters of the Rangers paramilitary base in the port city of Karachi.

"It is a heavy blast near the Rangers office, with some casualties," said senior police official Javed Odho. He told Pakistani television the bomber had used more than 100 kg of explosives in the attack.

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