Leading Turkish businessman Mustafa Koç suffers heart attack

Turkey's leading businessman Mustafa Koç suffered a heart attack on Jan. 21.

He was hospitalized to Istanbul's Beykoz State Hospital and his condition reported to be critical.

Koç was later transferred to the Vehbi Koç Foundation American Hospital (Amerikan Hastanesi), which he owns, by helicopter.

Meanwhile, Koç Holding said in a statement that Koç's treatment was ongoing.

The Beykoz State Hospital also announced that Koç suffered heart attack while exercising. First aid was provided by his bodyguard and exercise coach and he was later resuscitated at the hospital, it added.

Koç is the chairman of Koç Holding, which is Turkey's top industrial conglomerate.

In Photos: Blanket of snow covers eastern Turkish province of VanIn Photos: Crowds commemorate slain journalist Hrant Dink in Istanbul on ninth anniversary of his deathIn Photos: Signs of clashes in Silopi's shattered homes after partial lifting of military curfewIn Photos: Heavy rain causes flooding in historical area of Turkey's EdirneIn photos: Turkey commemorates Rumi with 'Night of Union' ceremony in KonyaIn Photos: Ta?yaran Valley in Aegean region to become nature parkPictures released by the Armed Forces depict destruction in southeastern Sur amid clashes, curfewIn Photos: Marks of violence visible across Nusaybin after lifting of curfewIn Photos: Turkey celebrates Christmas Eve with services In Photos: Turkey provides assistance in rare UN-backed swap dealHürriyet's Sebati Karakurt photographs Diyarbak?r's Sur amid curfew and clashesIn Photos: Istanbul welcomes 2016 covered in snowIn Photos: Cities across the world celebrate New YearIn Photos: Snow produces picturesque scenes across Turkey after days of stormsIn Photos: At least 27 refugees' bodies...