President, PM mourn Punjab train tragedy
Modi termed the disaster "heart wrenching".
"My deepest condolences to the families of those who lost their loved ones and I pray that the injured recover quickly. Have asked officials to provide immediate assistance that is required," Modi said.
Congress President Rahul Gandhi asked the Punjab government and party workers to provide relief at the accident site.
Railway Minister Piyush Goyal said immediate relief and rescue operations were being carried out.
Union Home Minister Rajnath Singh spoke to the Punjab Home Secretary and the Director General of Police of Punjab. He said the Centre would provide all possible assistance to the state.
West Bengal Chief Minister Mamata Banerjee expressed grief.
Delhi Chief Minister Arvind Kejriwal expressed his pain over the loss of lives and urged his party workers to provide help at the accident site.
CPI-M General Secretary Sitaram Yechury tweeted: "Shocked... Responsibility and accountability must be fixed at the very top for such accidents."