In Islamabad, Pakistani military officials said Indian troops fired first, wounding two civilians. The officials spoke on condition of anonymity in line with military policy.
Pakistani Foreign Ministry spokesman Aizaz Ahmad Chaudhry called the cease-fire violations "a matter of great concern."
On Wednesday, India accused Pakistani troops of firing guns and mortars on at least 50 Indian border posts overnight in Kashmir, calling it the most serious cease-fire violation in a decade.
Analysts say it is too early to determine whether the firing signals a more serious escalation on the horizon. Vivek Katju, a retired Indian diplomat, said the violence could be an attempt to raise tensions along the border to draw international attention to the conflict.
India and Pakistan have fought two wars over control of Kashmir, which is divided between them and claimed by both.
India regularly accuses Pakistan of supporting Kashmiri rebels who have been fighting on the Indian side since 1989 for independence or a merger with Pakistan.
An estimated 68,000 people have been killed in the conflict, though most resistance is now shown through street protests. Pakistan denies giving any backing to the rebels beyond moral support.
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Associated Press writer Rebecca Santana contributed to this report from Islamabad.