As many people were feared trapped after flood in Uttarakhand's Joshimath following an avalanche, Prime Minister Narendra Modi and Union Home Minister Amit Shah on Sunday spoke to state Chief Minister Trivendra Singh Rawat and reviewed the situation in the state. The leaders also suggested all possible help from the Centre.

While in Assam, the Prime Minister reviewed the situation in Uttarakhand during a telephonic conversation with Rawat and other top officials. He took stock of the rescue and relief work underway.

"Authorities are working to provide all possible support to the affected," Prime Minister's Office tweeted.

From his personal Twitter handle, the Prime Minister further tweeted that he is constantly monitoring the unfortunate situation in Uttarakhand.

"India stands with Uttarakhand and the nation prays for everyone's safety there. Have been continuously speaking to senior authorities and getting updates on NDRF deployment, rescue work and relief operations."

Meanwhile, The Home Minister also spoke with Rawat and Into-Tibetan Border Police (ITBP) Director General S.S. Deswal.

Shah further said that four National Disaster Response Force (NDRF) teams are being airlifted to Dehradun to reach Joshimath where a massive flood was witnessed due to the water level in Dhauliganga river suddenly crossed its regular flow on Sunday morning following an avalanche near a power project in the Reni village of Chamoli district.

The Home Minister assured Uttarakhand Chief Minister to provide all possible help to the state from the Centre.

The incident took place near the Reni village, which is 26 km far from Joshimath. The Dhauliganga river got flooded and destroyed many houses situated at the river banksides.

The ITBP earlier said that there was some cloudburst or breaching of the reservoir at around 10 a.m. which resulted in the flooding in Dhauliganga -- one of the six source streams of the Ganges river. The 85 km river meets the Alaknanda River at Vishnuprayag at the base of Joshimath mountain in Uttarakhand.

Several labourers working at the Rishi Ganga hydroelectric power project were feared missing after a glacier broke.

A dam of the Tapovan power project was breached and feared to have been washed away.

ITBP and State Disaster Response Force (SDRF) personnel have been rushed to the affected areas to evacuate stranded people.

"Casualties feared. Hundreds of ITBP men rushed for rescue," the ITBP said.

Rawat has convened an emergency meeting to take stock of the situation and to supervise rescue and relief operations