Kings of Leon have been forced to cancel more live shows.

The 'Sex on Fire' singers - who postponed their New York gig over the weekend - have been forced to cancel their tour dates until August 26 after drummer Nathan Followill suffered broken ribs when a pedestrian jumped in front of the group's tour bus forcing it to make an emergency stop.

The rockers - who were scheduled to perform in New York, Virginia, Ohio, Indiana and New Hampshire - cancelled the eight shows to aid the 35-year-old's recovery, after doctors at the Mount Sinai Roosevelt Hospital in New York insisted he rests, reports MTV news.

Nathan said in a statement: ''I'm counting down the days until I can get back in the saddle and continue what has been our best American tour so far.''

The group announced the news of the accident on their Facebook page, writing: ''The band was en route to their hotel after their show in Boston when a pedestrian jumped in front of their tour bus, causing the bus to stop short, injuring Nathan Followill.

''Nathan is being treated for broken ribs, but is doing well.''

Following the news, Nathan was inundated with messages of support from fans and has promised to be back ''better than ever''.

He tweeted: ''Thank you for all of the get well soons. I'm a little banged up but will be back better than ever. (sic)''

Guitarist Jared Followill - Nathan's brother - admitted he felt ''so sad'' about the accident, especially because the band are enjoying the tour so much.

He tweeted: ''So sad this a.m.. Bus accident last night. Nathan has broken ribs. This was the most fun tour in a while. We'll be back ASAP. #GetWellNate (sic)''