Pakistani investigators were following "important leads" to identify who was behind the attack on the Sri Lankan cricket team in Lahore, foreign minister Shah Mehmood Qureshi today.
The ambush in broad daylight, and the apparent ease with which around a dozen gunmen escaped after a firefight with police of almost 30 minutes, sent shudders through a world fearful of nuclear-armed Pakistan's inability to contain rising militancy.
"We also have some important leads that would eventually unearth people responsible for this terrible act," Mr Qureshi told a news conference with his Sri Lankan counterpart in Islamabad.
Sri Lankan Foreign Minister Rohitha Bogollagama said this was the first attack on its nationals outside the country and he did not rule out possibility that the rebel Liberation Tigers of Tamil Eelam (LTTE) movement was involved.
Desperate for leads, police rounded up scores of people without establishing any link, according to officials, although one mid-level officer in the probe told Reuters a cellphone had been found that led to the arrest of at least one real suspect.
Seven Pakistanis, including six police and the driver of a bus carrying match officials, were killed in yesterday's attack on the Sri Lankan team as it was being driven to the Gadaffi Stadium for the third day of a match against Pakistan.
Six Sri Lankan players were wounded along with two team officials, including a British assistant coach. They flew back to Colombo along with the rest of the tour party last night.
ICC match referee Chris Broad told a news conference in London he and other match officials had been left like "sitting ducks" by a lack of security.
The Punjab government has offered a reward of around $125,000 for information on the attackers, who were armed with AK 47s, hand grenades and rocket propelled grenades.
Television footage showed gunmen wearing track suits and trainers and shalwar kameez, traditional long shirt and baggy pants. Some appeared to be barely 20 years old.
They appeared to leave the scene of the attack quite calmly, walking and on motor cycles.
Reuters