WASHINGTON- U.S. President Barack Obama will announce plans to seek to leave 9,800 U.S. troops in Afghanistan after the end of this year, a senior administration official said.

Under the scenario envisioned by Obama , the 9,800 troops would be used for training of Afghan forces and counter-terrorism operations.

The 9,800 would be reduced by half by the end of 2015, and by the end of 2016, the U.S. presence would be cut to a normal embassy presence as has been done in Iraq, the official said.