ISTANBUL (Reuters) - Downside risks that could pull down Turkey's year-end economic growth target of 4.5 percent have increased, Turkish deputy Prime Minister Mehmet Simsek said on Sunday.

"When we had estimated the 4.5 percent growth, the environment both globally and in Turkey was very different," Simsek said in an interview with CNN Turk television.

(Reporting by Humeyra Pamuk; editing by Andrew Roche)