But the team from Switzerland fought back with a surprising equaliser as Ebenezer Assifuah used his electric pace and composure to strike beyond the onrushing Simon Mignolet with 18 minutes on the clock.
Brendan Rodgers' side had the majority of possession thereafter, but were unable to kill off the contest by scoring a second goal before the half-time whistle blew at 1-1.
Both Origi and Ings had efforts on goal in the second half, but they could not breakdown the visitors resilience in defence.
2015/16 UEFA EUROPA LEAGUE - GROUP B
Match report by Joe Baker