​Watford have confirmed the signing of Östersunds FK winger and Sweden international Ken Sema on a five-year deal, with the 24-year-old becoming the Hornets' fifth incoming transfer of the summer so far.

An announcement from the Premier League club was expected imminently after Östersunds FK chairman Daniel Kindberg ​confirmed he was leaving on Wednesday.

A statement on Watford's ​website reads: "Watford FC are delighted to have secured the permanent signing of Sweden international Ken Sema.

"The 24-year-old winger has agreed a five-year deal with the Hornets and arrives from Allsvenskan outfit Östersunds FK."

Watford have made a strong start to the summer transfer window, bringing in Gerard Deulofeu on a permanent deal from ​Barcelona following a decent loan spell as well as signing Espanyol right back Marc Navarro, Stevenage centre back Ben Wilmot and Bologna left back Adam Masina.

They also sold Costel Pantilimon to ​Nottingham Forest recently, while a load of younsters have been released following their end of their contracts.

Östersunds FK chairman Kindberg told the club's ​website"Ken Sema is a great person both on and off the pitch. I am very happy for him and the whole club wants to congratulate him. At the same time, he will of course be missed."

IF Brommapojkarna v Ostersunds FK - Allsvenskan

Watford are looking to improve upon their finish of 14th during the 2017/18 ​Premier League, with Javi Gracia entering his first full season as the club's manager after taking over in January following the sacking of Marco Silva, now at ​Everton.