Cairo - Egypt on Wednesday released blogger and journalist Wael Abbas, known for standing up against police violence, after nearly seven months in detention, his lawyer said.

Abbas was arrested at his Cairo home in May and questioned over alleged involvement in helping a "terror group achieve its objectives" and spreading "fake news".

"Finally, Wael Abbas is released," his lawyer Gamal Eid, who heads the Arabic Network for Human Rights Information, wrote on Facebook.

Abbas has been posting about police violence, torture and corruption on social media for more than a decade.

He was particularly active during the January 2011 street protests that toppled president Hosni Mubarak.