According to this, (search for Hasselt):
https://www.usmilitariaforum.com/for...s-ago/page/25/
Thursday, May 11, 1944
· 126 Lancasters and six Mosquitos hit Hasselt, in northeastern Belgium. The target was marked and 39 aircraft bombed, but all missed the railway yards because of thick haze and the Master Bomber ordered the bombing to stop.
Friday, May 12, 1944
-Seven Lancasters, and four Mosquitos to the rail yards at Hasselt, Belgium.
Monday, May 22, 1944
8th AF -130 P-47s are dispatched on a fighter-bomber attack on railroad bridges at Hasselt and Liege, Belgium, losing one P-47.
Tuesday, May 23, 1944
8th AF - 103 P-51s are dispatched to bomb a railroad bridge at Hasselt, Belgium.