Sunderland striker Jordan Cook has extended his loan spell at Carlisle for another month.
The 21-year-old, who joined the Cumbrians in mid-January, has made four appearances for Greg Abbott's side since making his debut in the 2-1 home win over Chesterfield.
"We've seen what Jordan can do and we're delighted that he'll be with us for another month," Abbott told the club's official website.
"He has energy and causes problems and has fitted in well. There are still some rough edges, but you'd expect that.
"He's getting used to League One football, he's enjoying himself and he knows what we expect, so it's a situation which benefits everyone."
Cook is scheduled to return to Sunderland after the home game against Bury on March 10.