China laid the blame at India's door on Monday for an altercation along their border in the western Himalayas involving soldiers from both of the Asian giants.
Both countries' troops have been embroiled in an eight-week-long standoff on the Doklam plateau in another part of the remote Himalayan region near their disputed frontier.
Last week, a source in New Delhi, who had been briefed on the military situation on the border, said soldiers foiled a bid by a group of Chinese troops to enter Indian territory in Ladakh, near Pangong lake.
Chinese Foreign Ministry spokeswoman Hua Chunying said that last Tuesday, Chinese border forces were carrying out "normal" patrols on the Chinese side of the line of actual control (LAC) in the Pangong lake area.
"During this time they were obstructed by Indian border forces and the Indian side took fierce actions, colliding with the Chinese personnel and having contact with their bodies, injuring the Chinese border personnel," Hua told a daily news briefing.
"China is extremely dissatisfied with this" and had lodged solemn representations, Hua said.
India's Foreign Ministry has confirmed the incident in Ladakh took place but has not given any details.
Indian media have shown footage taken on a mobile phone purportedly of the scuffle, originally posted by a retired army officer, with stone throwing and shoving by soldiers of both countries.
The heighten tension on both ends of the border come ahead of a summit of the BRICS group of nations in the Chinese city of Xiamen in early September, with leaders from Brazil, Russia, India, China and South Africa due to attend.
China has repeatedly asked India to unilaterally withdraw from the Doklam area, or face the prospect of an escalation. Chinese state media have warned India of a fate worse than its crushing defeat in a brief border war in 1962.
Stand-off will end 'soon'
India's home minister meanwhile on Monday said he believed the stand-off with China would end soon.
Home Minister Rajnath Singh said India wanted peaceful relations with its neighbours as he addressed a unit of border guards in New Delhi.
"A deadlock is going on between India and China in Doklam. But I think a solution will come out soon. China will also take a positive step from its side," Singh said as he addressed the paramilitary Indo-Tibetan Border Police (ITBP).
"We want to maintain good relations with our neighbours. We don't want conflict, we want peace."
Indian and Chinese soldiers have for more than two months been facing off on a disputed tract of land known as Doklam that India says is Bhutanese territory and China claims for itself.
Some analysts have said the dispute amounts to the worst crisis in relations between the two nuclear-armed neighbours in decades.