CAIRO, Jul 18 (Aswat Masriya) - Egypt's prosecution renewed on Monday the detention of human rights lawyer Malek Adly for 15 days pending investigations.

The prominent lawyer was detained on May 6 after publicly opposing the maritime border demarcation agreement between Egypt and Saudi Arabia, which saw Egypt handing the two Red Sea islands of Tiran and Sanafir to Saudi Arabia.

In June, the Administrative Court annulled the agreement, affirming that the islands fall within Egypt’s borders. However, the State Lawsuit Authority, which represents the government, appealed against the ruling before the Supreme Administrative Court .

Following Monday's renewal decision, lawyer Tarek El-Awady called the renewal an act of vengeance, in a statement published on his Facebook page.

Adly is facing charges of inciting protest, publishing false news, possessing publications inciting against the state, joining an organisation that aims to disable the provisions of the constitution, and working to overthrow the regime.

According to statements issued by Adly's wife, Asmaa Ali, her husband has been held in solitary confinement since his arrest, which led to a rapid deterioration of his health.

Earlier in July, the Shubra court judge denied an appeal put forth by Adly's defence team against his detention pending investigation.