Police in Mozambique have camped outside the office of the main anti corruption body NGO, the Centre for Public Integrity (CIP), to stop the distribution of campaign T-shirts.

The organisation has printed 10,000 T-shirts emblazoned with “I’m not paying hidden debts” as a reaction to the debt the government has incurred which has left it with a $2bn (£1.5bn) bill.

Police say they were carrying out orders from their superiors, and that the T-shirts might be used to “create agitation”.

CIP is encouraging other organisations to use the same design and print more T-shirts against using public funds to pay clear the fraudulent loans.

The organisation says anyone leaving the CIP offices with a T-shirt was being ordered to remove it. Officers were also searching peoples' bags.

A human rights activist has shared pictures of the police outside the CIP office.

The questionable loans were obtained from Swiss investment bank Credit Suisse and VTB of Russia.

The money was granted because of government guarantees signed by then-Finance Minister Manuel Chang. He is currently under police custody in South Africa, after US authorities requested for his extradition on charges of conspiracy to commit money laundering, wire fraud and securities fraud.

Mr Change denies any wrongdoing.

US prosecutors say that through a series of financial transactions between approximately 2013 and 2016, Mr Chang and others created fraudulent maritime projects and used state-owned companies in Mozambique as fronts to raise $2bn.