Oxford United have strengthened their squad by signing striker Justin Richards, midfielder Lewis Montrose and forward Josh Parker.

Justin Richards, who spent the second half of the 2007-8 season on loan with the U’s, joins on a month’s loan this time from Burton Albion and goes straight into the squad to face Sheffield United in the FA Cup third-round tie at the Kassam Stadium tomorrow.

Montrose has signed on loan from Gillingham until the end of the season.

Parker has made three substitute appearances since signing non-contract terms with the U’s before Christmas.

The former QPR youngster can play up front or out wide and has agreed a deal to stay until the end of the season.