The United States has seen increased activity around a North Korean missile site, suggesting preparations for a possible space launch in the near future, U.S. officials told Reuters on Thursday.

The finding was revealed as Washington shows growing concern that Pyongyang could use space technology to enhance its missile capability and while United Nations Security Council members discuss fresh sanctions against North Korea after it conducted its fourth nuclear test on Jan. 6.

The officials cited intelligence suggesting movement of components and propellant at North Korea's Sohae satellite launch facility. A test could take place within a couple of weeks, they said.