The 87 Indians, mostly fishermen who were freed yesterday, will return tomorrow after the issuance of travel documents by the Indian High Commission in Islamabad.
Earlier, an official of the Pakistan Rangers had told reporters that it has handed over the 87 Indian nationals who were released from a Karachi jail after over two years detention.
However, Indian officials in New Delhi said the intimation about their release was given at a very short notice and though it was a case of "verified nationality" they need to be given documents to cross over to India.
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Pakistan's leading charity Edhi Foundation spokesman Younis Bhatti told PTI that it has been asked to provide food to the Indian nationals.
"We are told that the Indian nationals could not cross the border because the official concerned was not present at Wagah to debrief and record their statements," he said.
The Indian nationals were freed from the Landhi Jail in Karachi yesterday. They arrived in Lahore by a train this morning.
"After releasing 87 Indians, we now have a total of 457 more (Indians) in the prison, and most of them are fishermen arrested for territorial violation," Jail's deputy superintendent Shakir Shah said.