Civil society groups Repubblika and Occupy Justice are organising another national protest in Valletta on Sunday afternoon.

The groups, which have held protests in Valletta almost every day, said on Wednesday that court evidence by Melvin Theuma, the middleman in the Daphne Caruana Galizia murder plot, continued to reveal the 'mafia network' at Castille.

The groups said they were strongly reiterating their called for Joseph Muscat to leave office immediately. 

They also insisted that the police should investigate and act against Dr Muscat himself as well as former chief of staff Keith Schembri.

The groups also called on the police to explain what investigations have been carried out by the economic crimes unit and whether Brian Tonna and Karl Cini from Nexia BT were being investigated. Nexia was mentioned as having set up secret Panama companies for Keith Schembri and minister Konrad Mizzi.

The groups said Sunday's protest in Valletta will be held at 4pm. They invited other NGOs to join. 

Thousands of people attended a similar protest last Sunday.