Motherwell midfielder Callum Slattery has been ruled out for the season after suffering a serious knee injury in training.

Slattery has been a regular feature in Motherwell’s midfield and joins Lennon Miller on the sidelines.

“First off, I want to wish Callum the very best in his recovery,” manager Stuart Kettlewell said on the club’s website.

“Losing him is a massive blow for the team and the nature (of how) he has picked up this injury only makes the situation worse for the player.

“We’ve not had our problems to seek with regards to injuries this season and this is another hurdle we have to deal with.”

Former Southampton player Slattery’s three-year contract expires in the summer. The 24-year-old has made 93 appearances for Motherwell.

Kettlewell said: “Callum will now begin his recovery and the staff here will look after him every step of the way and I have no doubts, with the Callum’s attitude and strong mentality, he will come back stronger and ready to go.”

Motherwell later made their first January acquisition by signing left-back Adam Montgomery on loan from Celtic.

The 21-year-old spent the first half of the season with Fleetwood after earlier loan spells with Aberdeen and St Johnstone.

“With the low numbers we currently have available, it’s important we bring the right players to the club who we think can make an impact,” Kettlewell said.

“Adam is still a very young footballer who is in the early part of his career, however, to have amassed 67 first-team games at his age, shows he already has experience and good knowledge of the game.”

The Steelmen are also reported to have made a move to sign Hearts midfielder Andy Halliday.