Tehran: Pakistan's Ambassador in Tehran Muhammad Mudassir Tipu has said that it is getting very hard to find the buses due to ongoing challenges here in Iran- apart from a range of other considerations.In a statement issued on X, Mudassir Tipu said therefore those of our nationals who wish to go to Pakistan , with our cooperation, are requested to kindly register with the Embassy immediately so that we can plan their departure without any further delay .'I particularly call on our nationals in Qom to cooperate with us in their immediate repatriation' the ambassador said.