Architect Robert Musumeci has asked the police to investigate environmentalist Astrid Vella over her allegations about him in a comment posted on timesofmalta.com.
Her comments were posted last Thursday under an article titled NGOs Point Guns At Architect Behind Baħrija Project.
He filed a libel suit on Tuesday against Ms Vella over the same comments.
In a letter sent through lawyers José Herrera and Veronique Dalli, Mr Musumeci has now asked the police to investigate the case and stop Ms Vella from writing libellous things in his regard.
A planning authority permit for the building of a house in Baħrija belonging to Nationalist Party president Victor Scerri has sparked off a controversy. Mr Musumeci is the architect.
In a press conference last week, environmental groups said Mr Musumeci, who also happens to be the PN mayor in Siġġiewi, had a history of obtaining permits even when there were serious objections by planning officials.
The development in Baħrija has been temporarily halted by Dr Scerri while he awaits the outcome of police and Mepa investigations which he himself requested.