Kilmarnock have rejected a £100,000 offer from Oldham for Northern Ireland striker Josh Magennis.
The 25-year-old striker appeared in all four of Northern Ireland's Euro 2016 fixtures, and was Killie's top goalscorer last season, netting 13 times. It is believed the Latics, now managed by former Northern Ireland assistant Stephen Robinson, will come back in with a higher offer.
Cliftonville have signed midfielder Ruairi Harkin from Irish Premiership rivals Coleraine.
The 26-year-old spent four years at the Bannsiders following a spell at Derry City, and becomes the Reds fourth summer signing.
Coleraine have moved to replace Harkin by bringing in David Kee from Linfield, initially on a year-long loan deal before a permanent move.
The 28-year-old, formerly of Ballinamallard, has only a year left of his contract at Windsor Park and becomes Oran Kearney's third addition to his ranks this summer, and has been instilled as club captain.
Linfield meanwhile have signed young midfielder Matthew Lynch from Glenavon, following a successful trial period.
Glentoran have continued their recruitment for the new campaign by signing Dwayne Nelson, the experienced goalkeeper most recently at Ballymena.