A soldier has been killed in a bomb attack outside a navy housing compound in the southern Pakistani city of Karachi, police say.
Four others were wounded when the bomb attached to a motorcycle exploded.
This is the first time that a military installation has been attacked in Karachi since an attack on a senior military commander in 2004.
The blast comes a day after militants attacked a convoy carrying supplies for Nato near the capital, Islamabad.
Taliban militants are generally seen to be behind such attacks.
Pakistani army troops have been fighting them in operations across the country's north-west.
"I can confirm that one Frontier Corps personnel has been killed in the attack," Zahid Shah, a senior Karachi police official, told the BBC.
He said the attack took place in the Baldia neighbourhood.
"The bomb was fixed in a bike parked outside the main gate of the compound," a security official said.
The injured have been taken to local hospitals and the site of the attack has been sealed.
The attack follows warnings from Taliban militants that they plan to attack Karachi.
The port city has largely escaped violence in other parts of Pakistan - although it remains a safe haven and recruitment centre for militants.