As many as 688 Indian nationals returned here on Sunday from strife-torn Ukraine on board three Air India evacuation flights from Romanian capital Bucharest and Hungarian capital Budapest. Civil Aviation Minister Jyotiraditya Scindia said that approximately 13,000 Indians are stranded in Ukraine as of now, and the government is making efforts to bring them back as soon as possible. Following the Russian military offensive against Ukraine, India has brought back a total of 907 stranded citizens from that country since Saturday when the first evacuation flight from Bucharest with 219 people on board landed in Mumbai under Operation Ganga.