Defence Minister Pranab Mukherjee has said India and Pakistan have agreed to withdraw troops from their present positions in Siachen glacier but the modalities have to be worked out.

• Demilitarise Siachen: Army to Centre

"We have agreed. They have agreed to withdraw troops from the present positions. There is no differing opinions about it, both sides have agreed," Mukherjee said in a television interview.

• Why Siachen matters

Replying to questions, the minister said, "The disagreement is that we are demanding that we must identify and delineate the places we were in before withdrawal, so that there is a record that the respective countries' troops occupied these places."

• Uttam's Take: Siachen

"The Pakistani point of view," Mukherjee said, "is that when we have agreed to withdraw from the respective positions, what is the relevance after the withdrawal agreement is signed. Therefore, this is the area of disagreement."