WASHINGTON, April 15—The United States has not delivered arms or ammunition to Pakistan since fighting erupted there March 25, officials said today. They added that there was no military equipment for Pakistan “in the pipeline” and that further deliveries were under review.

Meanwhile, Senators Clifford P. Case, Republican of New Jersey, and Waiter F. Mondale, Democrat of Minnesota, jointly submitted a resolution in the Senate urging a total cutoff of United States arms, shipments to Pakistan. Others who joined in sponsoring the resolution in eluded Senators Edmund S. Muskie, Democrat of Maine. George McGovern, Democrat of South Dakota, and William B Saxbe, Republican of Ohio.

Two days ago officials conceded under questioning that the. United States had sold Pakistan approximately $40million in “nonlethal” military equipment since April, 1967, but acknowledged that up to 25 per cent of it had been ammunition. Today they asserted that, “not more than 10 to 15 per cent” of the equipment had been ammunition.

Officials also disclosed that the latest United States shipments of military spare parts had been delivered shortly before March 25.