Taiwan President Tsai Ing-wen and Vice President William Lai will each donate a month's salary for Turkish earthquake relief efforts, their office said Thursday.

Tsai and Lai, who are widely expected to stand for the presidency in elections due next year, "hope to do their part to help Türkiye rebuild its homeland as soon as possible," the presidential office said in a statement.

Türkiye, like most countries, has no diplomatic relations with Chinese-claimed Taiwan, but they two maintain de facto embassies in each other's capitals and there are direct flights between Istanbul and Taipei.

Tsai visited the de facto Turkish embassy in Taipei on Thursday to sign a book of condolence, writing: "My heart goes with our Turkish friends. Taiwan stands with Türkiye!", according to her office.

Last year, Tsai and Lai also both donated one month's salary to aid humanitarian relief efforts for war-torn Ukraine. Tsai earns around T$400,000 ($13,300) a month.

The death toll from the earthquake and aftershocks earlier this week passed 16,000 on Thursday, with some areas facing slow arrival of rescue teams due to difficult conditions.

Taiwan, which frequently suffers earthquakes itself, has already announced $2 million in disaster relief and has sent two rescue teams to Türkiye to help in search efforts for survivors.

Tsai spoke by video call to some of Taiwan's team on the ground Wednesday.

"I would like to thank all the members for not being afraid of difficulties and going all out so that Taiwan and Türkiye can help each other," she wrote on her Facebook page.

Türkiye joined international efforts and sent rescuers to Taiwan in 1999 after a massive earthquake killed more than 2,000 people.