US TV drama 24, which stars Kiefer Sutherland as special agent Jack Bauer, will return for two more series, according to trade magazine Variety.
The reported deal comes as US fans await Monday's end of its sixth series, which closes with a two-hour special.
It is thought some changes will be made, but the concept where each episode covers one hour of real time will remain the same.
The show won best drama and best actor for Sutherland at last year's Emmys.
It has received 51 Emmy nominations since it first aired in 2001.
In January 24 was criticised by US Muslim groups, who accused its latest storyline of fuelling intolerance.
The series began with Islamic terrorists waging an 11-day campaign of suicide bombings across the US.
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