India has warned that Pakistan would “pay for this misadventure” following a deadly attack by militants on an army camp in the northern state of Jammu and Kashmir that has stoked tensions between the nuclear armed rivals.

Defence Minister Nirmala Sitharaman told reporters on Monday evening that the Indian army has ample evidence to prove that “the handlers of the terrorists were back in Pakistan.”

Saturday’s attack on the camp near Jammu, the winter capital of the state, was the worst in months with six soldiers and the father of a soldier killed. Among the 10 wounded were women and children. At least three militants were killed, according to Indian officials, bringing the death toll to 10.

“Pakistan is expanding the arc of terror... resorting to ceasefire violations to assist infiltration,” Sitharaman said. “Pakistan will pay for this misadventure.”

Indian officials have said the heavily armed attackers involved in Saturday’s attack were members of the Pakistan-based Jaish-e-Mohammad (JeM) militant group.

Pakistani officials criticized India for rushing to a conclusion without a full inquiry.