MOSCOW (REUTERS) - Russian President Vladimir Putin said on Saturday (March 19) that assistance to the relatives of those killed in a plane crash in southern Russia was the priority, local news agencies cited Kremlin spokesman Dmitry Peskov as saying.

"The head of the state said that now the main thing is to work with the families and the loved ones of those who had died," Peskov was quoted as saying.

One of the two flight recorders was found at the crash site, and the search for the second one is ongoing, the RIA Novosti news agency reported.

The Investigative Committee of Russia said on Saturday (March 19) that it is looking into a pilot error or a technical failure as the most likely causes for the crash.

"At present, we are looking into two main theories for the plane crash in Rostov-on-Don: pilot error in connection with deteriorating weather conditions or a technical error," Interfax news agency cited a representative of the Committee, Oksana Kovrizhnaya, as saying.

All 62 people aboard the passenger jet flying from Dubai to southern Russia were killed when the Flydubai plane crashed on its second attempt to land at Rostov-on-Don airport.

Flydubai confirmed on its Facebook page that flight FZ981 was carrying 55 passengers, including 44 Russians, eight Ukrainians, two Indians and one Uzbekistani.