Southampton have signed striker Adam Armstrong from Blackburn on a four-year deal.

The 24-year-old was second in the Championship scoring charts last season with 28 goals in 40 appearances.

It is believed Saints paid around £15m for Armstrong's signature.

"Adam was a big target for us this summer, so we are very pleased to have added him to the squad," said Saints boss Ralph Hasenhuttl.

"He is at a good stage of his career for him to be coming here. He is a young, dynamic player who has developed well so far and already has good experience, as well as an impressive goalscoring record, and I believe we can now help him realise even more of his potential.

"He will bring a lot of qualities to our team and he gives us another good option in attack, which will be important for us."