Azerbaijani President Ilham Aliyev has sent a letter of condolences to his North Macedonian counterpart Gordana Siljanovska-Davkova over a deadly fire at nightclub.

A devastating fire tore through a nightclub in North Macedonia’s eastern town of Kocani killing 59, with at least 155 others injured, local media reported Sunday.

The blaze erupted late Saturday night at the crowded venue, located about 100 kilometers (62 miles) from the capital Skopje. Authorities said 22 of the injured remain in critical condition.

The Government of North Macedonia has declared a seven-day national mourning period, starting Monday.