Temperatures fell to minus 8 degrees Celsius (17.6 Fahrenheit) amid heavy snowfall in Pakistan's mountain resort town of Murree overnight, killing at least 16 people who were stuck in their vehicles, the interior minister said Saturday.

The military has been mobilized to clear roads and rescue people still trapped, Sheikh Rashid said in a video message, adding: "At least 16 to 19 people died inside their vehicles."

Over 100,000 cars had entered the scenic town of Murree in the past few days to see the unusually heavy snowfalls, causing an enormous traffic jam on roads leading in and out, a police spokesperson said.

Murree, about 70 kilometers (45 miles) northeast of Islamabad, has long been popular for day trips from the capital.

The Punjab province chief minister's office said Murree had been declared a "disaster area" and urged people to stay away.