Mayor loses another key councillor.

Rome's mayor Ignazio Marino has announced a reshuffle of the city's cabinet whose new line-up will be revealed on Tuesday 28 July.

The news comes as Marino's dwindling administration lost another key member – the councillor in charge of the city’s budget, Silvia Scozzese – whose resignation on 25 July was widely anticipated.

Since Marino took office more than two years ago he has lost eight of his team, including his deputy mayor Luigi Nieri.

Some have left office due to being allegedly implicated in the ongoing Mafia Capitale scandal involving a criminal syndicated operating within city hall.

The capital's commerce and tourism councillor Marta Leonori has been identified by Italian daily newspaper La Repubblica as a possible successor to Nieri as Marino's deputy.

The reshuffle by the embattled mayor follows a warning from Italy's premier Matteo Renzi who said Marino should either prove himself fit to govern or else "go home."

Marino has also sacked the top managers of the capital's public transport company ATAC and promises to find €200 million of new investment for the troubled network.

Marino announced that the city is seeking an industrial partner “while maintaining a majority public stake” in the transport company – a decision made in collaboration with ATAC and the governor of the Lazio region, Nicola Zingaretti.

The reforms follow weeks of disruptions and delays across the system, with metro drivers staging a go-slow in opposition to clocking in at the beginning and end of their shifts.

ATAC is Italy's largest public transport firm but has suffered from years of mismanagement, insufficient investment, allegations of corruption and regular strikes.

Outlining the need for increased productivity, Marino has in the past highlighted the transport system in Milan where metro drivers work 1,200 hours per year, compared to the 730 hours worked by their colleagues in Rome.