KUALA LUMPUR, Malaysia — The missing Malaysian jetliner may have attempted to turn back before it vanished from radar, but there is no evidence it reached the Strait of Malacca, the country's air force chief said Wednesday, denying reported remarks he said otherwise.

The statement suggested continued confusion over where the Boeing 777 might have ended up, more than four days after it disappeared en route to Beijing from Kuala Lumpur with 239 people on board.

Air force chief Gen. Rodzali Daud was quoted as saying in local media report Tuesday that the military had radar data showing the plane had turned back from its original course, crossed the country and made it to the Strait of Malacca to the west of Malaysia. The Associated Press contacted a high-level military official, who confirmed the remarks.

In a statement, Daud denied saying the remarks, and referred to a statement he made March 9 in which he said the air force has "not ruled out the possibility of an air turn back" and said search and rescue efforts had been expanded in this regard.

Authorities began their search for the missing aircraft at the position it was last reported to be over the sea between Malaysia and Vietnam. But they have also said search operations were ongoing in the Malacca strait.

With no debris found yet, authorities have not ruled out any possible cause, including mechanical failure, pilot error, sabotage or terrorism.