Pakistan's prime minister has confirmed the arrest of two men that India says had a role in last month's attacks in Mumbai that left at least 171 people dead, reported Aljazeera.
Yousaf Raza Gilani said in Multan city on Wednesday that Zaki-ur-Rehman Lakhvi and Zarrar Shah, members of armed group Lashkar-e-Taiba, are being questioned by Pakistani investigators.
"They have been detained for investigation," Gilani said.
Confirmation of Lakhvi and Shah's arrest came a day after Indian police released the names or aliases of nine suspected attackers killed during the Mumbai assaults.
Police said all the men named were from Pakistan.
Gilani said he had no fresh information on whether Maulana Masood Azhar, leader of the Jaish-e-Mohammad group, was among those detained.
Pakistan has come under pressure from the US to co-operate with India in the investigation into the Mumbai attacks.
But Islamabad has said that anyone arrested and accused of involvement in the attacks on India's financial capital will be tried in Pakistan.
Both Lashkar and Jaish-e-Mohammad are banned in Pakistan.
Although Azhar or his group have not been named as suspects in the Mumbai attacks, he is on a list of 20 individuals that New Delhi has asked Pakistan to hand over.
About a dozen people have been arrested by Pakistani security forces so far, intelligence officials say.
Most were detained after a raid on a camp outside Muzaffarabad, the capital of Pakistani Kashmir, the officials said.
The News, a Pakistani newspaper, reported on Tuesday that arrests were also made at offices of the Jamaat-ud-Dawa (JuD) charity in the Mansehra and Chakdra districts of North West Frontier Province.
The organisation is considered by many analysts to be a front for Lashkar, which is designated a terrorist organisation by the US.
India has said that it wants the US to add JuD to its list of terrorist organisations.
Lashkar and Jaish-e-Mohammad were blamed for a 2001 attack on the Indian parliament that brought the two nuclear powers to the brink of war.