The brother of key Paris attack suspect Salah Abdeslam on Tuesday urged his brother to surrender as police in France and Belgium stepped up their hunt for the fugitive.

The brother of key Paris attack suspect Salah Abdeslam on Tuesday urged his brother to surrender as police in France and Belgium stepped up their hunt for the fugitive.

"I advise him to surrender to the police," his brother Mohamed Abdeslam, who was himself arrested and freed without charge in Belgium, told France's BFMTV news channel, adding that it would allow the "legal system to shed light" on the case.

160 people were killed on Saturday when a terrorist group stormed a Paris theatre following two blasts near Stade de France.