A strong earthquake struck near central Myanmar’s Mandalay city on Friday morning.

The earthquake of magnitude 7.5 took place at 11.50 am local time, according to India’s National Center for Seismology. A second quake, an aftershock, measuring 7.0 struck at 12.02 pm, the centre said.

The United States Geological Survey said the magnitude of the first quake was 7.7 and the second was 6.4.

Both quakes were shallow with a depth of 10 km. Shallow earthquakes tend to be more destructive.

Mandalay is Myanmar’s second-largest city by population.

The country’s military government has declared a state of emergency in six regions and states, including the capital Naypyitaw and Mandalay, AP reported.

At least three people have been killed in the country’s Taungoo town where a mosque partially collapsed, Reuters reported quoting two eyewitnesses.

The authorities in neighbouring Thailand have also declared a state of emergency in the capital Bangkok, about 1,000 km away from Mandalay, after damage was reported to buildings in the city, AFP reported.

At least three workers have died and 90 others are missing after a 30-storey under-construction skyscraper collapsed in Bangkok following the quake, AP reported. Seven people have been rescued from the collapsed building.

Several offices and shops in the city were evacuated.

Mild tremors were felt in Kolkata and Imphal on Friday, PTI reported, adding that no damage had been reported there so far.

Prime Minister Narendra Modi said that India was ready to offer assistance to Myanmar and Thailand. “Praying for the safety and wellbeing of everyone,” he added on social media.

The junta in Myanmar has asked for international aid, AFP reported.

Photos shared on social media showed the Old Sagaing Bridge on the outskirts of Mandalay having collapsed.