At least 11 people have been killed and more than 300 treated in hospital after drinking coconut wine in the Philippines, including some who were celebrating at a Christmas party, health and local authorities said on Monday.

Axar.az reports citing Reuters that the poisoning occurred in Laguna and Quezon, two provinces south of Manila, and all had consumed lambanog, a drink popular in provinces and consumed widely during holidays and celebrations.

Many were admitted to hospitals on the urging of mayor Vener Munoz in Rizal, Laguna, where the deaths occurred between Thursday and Sunday.

Two people who had been in critical condition were improving, he told local radio. The coconut wine that was consumed had been made in his town, he added.