Police in Pakistan say a car bomb has killed two people and wounded at least three others in the restive port city of Karachi.
Authorities say the bomb went off early Saturday, outside a car rental shop in a southern residential district.
So far, there have been no claims of responsibility for the attack.
Karachi has been hit by a number of bomb blasts in recent months. Police blame Islamic extremists and al-Qaida-linked militants for most of the attacks.
Meanwhile, Pakistan says it has arrested another 18 suspected members of the al-Qaida terror network in an early Friday raid in Lahore, the Punjab provincial capital.
They say the raid was based on information from two recently captured senior al-Qaida operatives: Tanzanian national Ahmed Khalfan Ghailani and Pakistani computer expert Naeem Noor Khan.