West Brom have announced Gonzalo Jara Reyes and Joe Mattock have joined Brighton on loan until the end of the season.
Sky Sports sources earlier on transfer deadline day revealed Mattock was set for a move to Amex Stadium after the Baggies signed Liam Ridgewell.
Mattock has already enjoyed a spell on loan this season, joining Portsmouth for six weeks in November.
Since returning to West Brom, he has made one appearance - in Saturday's FA Cup tie with Norwich.
Chile international Jara has already had a successful two-month spell at Brighton, having moved south in October before being recalled in late December.