St Johnstone have moved to strengthen their defence by signing Efe Ambrose ahead of Saturday's cinch Premiership showdown with Rangers.
The 32-year-old Nigerian has been a free agent since leaving Livingston in the summer and Saints have offered him a deal following the departure of captain Jason Kerr and injury to fellow centre-back Liam Gordon.
Ambrose, a former Celtic and Hibernian player, could make his debut against champions Rangers at McDiarmid Park.
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