One ITBP personnel, among the eight injured in Friday's landslide in Lower Siang district of Arunachal Pradesh, succumbed to his injuries on Saturday, raising the death toll to five, a police officer said.

Out of the eight injured, the condition of two personnel were critical, the officer said.

The two critically injured Indo Tibetan Border Police (ITBP) personnel were initially taken to the Army hospital at Likabali, and later, referred to a hospital in Assam's Dibrugarh on Friday, Superintendent of Police (SP) of Lower Siang Singjatla Singpho said, adding that one of them died there on Saturday morning.

The other six personnel with minor injuries were treated at the local community health centre, Singpho said.

Four ITBP personnel were killed when a huge boulder, loosened by monsoon rains, rolled down a mountain and hit their vehicle on the Basar-Akajan road in Lower Siang district of Arunachal Pradesh on Friday.

The boulder rolled down the mountain slope and smashed the mini bus carrying 20 ITBP personnel.

The incident occurred at 2.30 pm, about 5 km from Likabali, the district headquarters of Lower Siang, when they were on way to it from Basar in West Siang district.

This was the second landslide-related incident in the state within five days.

The toll due to landslide this monsoon has risen to nine.

On June 24, five labourers were buried alive when a retaining wall of an under-construction RCC building collapsed on a labour barrack at Donyi Colony here.