President Tony Tan Keng Yam and Prime Minister Lee Hsien Loong have written to their Turkish counterparts to convey condolences on the triple bombings at Istanbul's international airport.

"I was shocked by the terror attacks at Istanbul Ataturk Airport on June 28, 2016 and was saddened over the loss of many lives," Dr Tan wrote to Turkish President Recep Tayyip Erdogan in a letter released yesterday.

"Singapore strongly condemns this act of terror against innocent civilians and stands united with Turkey in its fight against terrorism."

The multiple attacks killed dozens of people, tearing through the terminal at one of the busiest travel times of the year for Turkey.

PM Lee said he was "shocked and saddened to learn of the terror attack" in a letter to Prime Minister Binali Yildirim. "Singapore strongly condemns this heinous act and stands in solidarity with Turkey in countering this global menace of terrorism," PM Lee said.

Home Affairs and Law Minister K. Shanmugam also conveyed his condolences to the victims of the attack and their families.

He wrote in a Facebook post: "This has shattered the peaceful Ramadan period, and brought grief to many Muslims and non-Muslims in Turkey and all around the globe. It is against the fundamentals of what Ramadan means."

The Ministry of Foreign Affairs said there have been no reports of Singaporeans injured or directly affected by the killings.

It also urged Singaporeans in Turkey to exercise vigilance and follow the instructions of the Turkish authorities.