BANGKOK (AP) — A 7.7 magnitude earthquake rocked Thailand and neighboring Myanmar midday on Friday, killing at least three people in Bangkok and burying dozens when a high-rise building under construction collapsed, and prompting Myanmar to declare a widespread state of emergency.

The midday temblor with an epicenter near Mandalay, Myanmar’s second largest city, was followed by a strong 6.4 magnitude aftershock.

Myanmar’s military-run government declared a state of emergency in six regions and states including the capital Naypyitaw and Mandalay, but with the country in the midst of a prolonged bloody civil war it was not clear how help would get to many regions.