His comments came hours after Pakistani soldiers objected to the construction of a footbridge by Indian troops across the Line of Control (LoC) to allow Pakistani quake victims to cross into occupied Kashmir.
"The delay is not on our side," Singh told reporters in New Delhi when asked to comment on bilateral plans to open the LoC at pre-selected points to help out the tens of thousands of quake victims.
Attempts by India to prepare a crossing point for earthquake survivors were thwarted when Pakistani troops objected to their building a footbridge at Teetwal, an army spokesman said.
The bridge, which was in the initial stage of construction, was planned across the Kishan-Ganga river in mountainous Teetwal.
"We have stopped work on the footbridge after objections from Pakistani soldiers," Indian army spokesman Vijay Batra told AFP.
A senior army official told AFP in New Delhi that the work would recommence only after the two sides had agreed on such projects.
"Militants have targeted our bus with a car bomb," a spokesman for India's Border Security Force told AFP. Indian troops, meanwhile, arrested a man from Pakistani Kashmir on Wednesday after he crossed the militarised LoC to meet his relatives in Uri.
Mohammed Ismail Choudhary, a resident of Muzaffarabad, was arrested on entering occupied Kashmir at Kaman Post. "To prevent him from crossing over, Pakistani troops started pelting stones at him but our boys didn't fire as he was not carrying any guns," Batra told AFP in occupied Srinagar.