NEW DELHI (AP) -- India has accused Chinese soldiers of launching an incursion far into Indian territory, in the latest flare-up of tension between the two Asian giants over their de facto boundary in the Himalayas.
Chinese troops entered 10 kilometers (six miles) into Indian territory on April 15 and pitched tents in the Depsang valley in the Ladakh region of eastern Kashmir, an Indian official said Tuesday.
Indian army commanders have met at least two times with their Chinese counterparts, but Chinese troops remain in Indian-claimed territory, said Tsering Angchuk, a civil administrator in Ladakh.
"They have not vacated the position so far," he said.
China dismissed reports of an incursion as Indian media speculation and said the border region has been peaceful.
"The two parties have maintained good communication and coordination on the border issue," Chinese Foreign Ministry spokeswoman Hua Chunying said Tuesday.
A day earlier, Hua said Chinese troops had "patrolled the border line and did not go one step across the Line of Actual Control," the unofficial boundary between the two countries.
India says Chinese troops have repeatedly crossed the boundary in recent years, leaving trash with Chinese markings as evidence of their presence. However, Indian officials said the new incursion was far deeper into Indian-claimed territory than before.
Indian Foreign Secretary Ranjan Mathai filed a protest over the incursion with the Chinese ambassador last week, an External Affairs Ministry official said on condition of anonymity because he was not authorized to speak to the media about the sensitive subject.
Ministry spokesman Syed Akbaruddin said the problem was caused by different views of the "exact alignment of the border."
External Affairs Minister Salman Khurshid played down the spat, saying the incident should not "reflect on the status of India's relations with China."
"We are doing everything that needs to be done to protect India's interests," Khurshid said Monday.
Defense analyst C. Uday Bhaskar from the National Maritime Foundation, a New Delhi-based think tank, said the two countries' large military presence along an undemarcated border was "undesirable."
"While incursions have occurred in the past, this was the first time that a platoon of Chinese soldiers, comprising around 50 men, have set up tents on the Indian side," he said.
"This raises potentially significant concerns on what would be China's next step. Would they be setting up bunkers next? This is a very disturbing development," Bhaskar said.
Opposition parties accused Prime Minister Manmohan Singh's government of not doing enough to counter Chinese arm-twisting.
"China knows the Indian government is weak. We have a powerless prime minister and they will try their best to take advantage of the situation," said Yashwant Sinha, a former external affairs minister from the opposition Bharatiya Janata Party.
India and China — neighbors with more than 1 billion people each — have had chilly relations since they fought a border war in 1962.
China claims around 90,000 square kilometers (35,000 square miles) of land in India's northeastern state of Arunachal Pradesh, while India says China is occupying 38,000 square kilometers (15,000 square miles) of territory in the Aksai Chin plateau in the western Himalayas.
The two sides have held 15 rounds of talks to resolve their border dispute, without making much progress.
China is a longtime ally and weapons supplier to Pakistan, India's bitter rival. The presence in India of the Tibetan spiritual leader the Dalai Lama and the self-declared Tibetan government-in-exile also remain a source of tension between New Delhi and Beijing. China is also suspicious of New Delhi's growing ties with the United States.
Despite the territorial tensions, trade between India and China has soared, with China becoming India's biggest trading partner. Two-way trade jumped from $5 billion in 2002 to nearly $75 billion in 2011, but declined slightly last year because of the global economic downturn. Trade remains heavily skewed in China's favor, another source of worry for India.
Hussain reported from Srinagar. AP news assistant Zhao Liang in Beijing contributed to this report.