Bolton have completed the signing of Partizan Belgrade midfielder Mohamed Kamara for an undisclosed fee.
The Sierra Leone international, commonly known as Medo, has agreed a three-and-a-half-year deal at the Reebok Stadium.
Kamara won back-to-back league titles and a Serbian Cup while with Partizan and played five games in the group stages of the 2011/2012 Champions League.
Before moving to Belgrade, the 25-year-old played for Helsingin Jalkapalloklubi and Kuopion Palloseura in Finland, earning Finnish citizenship in the process.
Wanderers manager Dougie Freedman told his club's official website: "I've known about Medo for a while now. Aki Riihilahti, who is a good friend of mine from when we were at Crystal Palace, played with him in Finland.
"I've seen a lot of him and never really thought I'd have any chance of working with him. From Finland he went over to Partizan Belgrade and has certainly become a better player over the last three or four years.
"It's the right deal for the club. He has the heart of a lion, the hunger, the desire and the right mindset - he wants to come here and do well and I look forward to working with him."
Bolton have also signed Southampton winger Steve De Ridder on an initial one-month loan. The 25-year-old, who is at home on either flank, joined Saints in the summer of 2011 and played a key role in their promotion to the Barclays Premier League last season.
Earlier, the Trotters completed the signing of Leicester defender Cian Bolger for an undisclosed fee. The 20-year-old centre-back has penned a three-and-a-half-year deal at the Reebok Stadium. A product of the Foxes' youth system, Bolger made 52 appearances across three separate loan spells with Bristol Rovers over the past three seasons.
Freedman revealed the Irish youngster will not be an immediate first-team fixture. He said: "Although he'll train with the first-team squad, Cian is one who will initially play in the development squad. We believe he has the potential to be knocking on the door for a regular place in the senior team in the near future."