Pakistan also said its forces later killed six Indian soldiers.

The latest skirmishes took place a day after US President Donald Trump talked to the Pakistani and Indian prime ministers and urged them to reduce tensions over the disputed Himalayan region.

Tensions have skyrocketed after New Delhi scrapped Article 370 in the Indian constitution that had granted Kashmir special autonomy. It split the state of Jammu and Kashmir into two and downgraded their status to union territories, sparking a row with Pakistan.

"Indian fire had martyred three civilians including a seven-year old boy in Tatta Pani sector along the Line of Control (LoC)," military spokesman Major General Asif Ghafoor tweeted Tuesday.

"Pakistan army targeted Indian posts, killing six Indian soldiers including an officer and wounding many others," he added.

PTI quoted officials as saying one Indian soldier died and four were wounded as Pakistani troops opened fire on forward posts and villages along the Line of Control in the Poonch district on Tuesday.