Wildfires sweeping through a Greek resort town killed at least 60 people, officials said, including families with children found clasped in a last embrace as they tried to flee the flames.

The inferno was by far Greece’s worst since fires devastated the southern Peloponnese peninsula in August 2007, killing dozens. It broke out in Mati, east of Athens, late Monday afternoon and was still burning in some areas on Tuesday.

“Greece is going through an unspeakable tragedy,” Prime Minister Alexis Tsipras said as he appeared on television to declare three days of national mourning.

Emergency crews found one group of 26 victims, some of them youngsters, lying close together near the top of a cliff overlooking a beach.

“They had tried to find an escape route but unfortunately these people and their kids didn’t make it in time. Instinctively, seeing the end nearing, they embraced,” Nikos Economopoulos, the head of Greece’s Red Cross, told Skai TV.

The strong smell of charred buildings and trees lingered in the air in parts of Mati on Tuesday, where white smoke rose from smoldering fires.

Residents wandered the streets, some searching for their burned-out cars, others for their pets. The eerie silence was punctured by fire-fighting helicopters and the chatter of rescue crews.

A Reuters photographer saw at least four dead people on a narrow road clogged with cars heading to a beach.

“Residents and visitors in the area did not escape in time even though they were a few meters from the sea or in their homes,” fire brigade spokeswoman Stavroula Maliri said.

Coastguard vessels and other boats rescued almost 700 people who had managed to get to the shoreline and pulled another 19 survivors and six dead bodies from the sea, the coastguard said.

In total, at least 60 people were killed and the death toll was expected to rise, Evangelos Bournous, mayor of nearby Rafina-Pikermi, said.

It was unclear how many people remained unaccounted for as coastguard vessels combed beaches to find any remaining survivors, with military hospitals on full alert, the government’s spokesman said.

One of the youngest victims was thought to be a six-month-old baby who died of smoke inhalation, officials said. Of the at least 94 people injured, 11 were in intensive care, and 23 were children, they added.