Opposition politicians on Wednesday filed a criminal complaint against Buenos Aires Mayor Mauricio Macri for alerting a pro-life group that a rape victim was going to undergo an abortion at a municipal hospital in the capital.

"Macri divulged information that should have been private and confidential, and that made it possible for Judge (Myrian) Rustan de Estrada to grant the motion presented by the NGO Pro-Vida, which caused the suspension of the abortion," complainant Emelia Alonso told a press conference.

The Argentine Supreme Court ruled in March that a woman cannot be prosecuted for terminating a pregnancy resulting from rape.

Last week, the Buenos Aires municipal legislature approved an ordinance decriminalizing abortion in the case of rape or a risk to the health of the mother.

But Macri, the scion of an industrial dynasty and former director of Argentina's most popular soccer club, Boca Juniors, vetoed the measure.

A Buenos Aires municipal hospital was set to terminate the pregnancy of a 32-year-old woman who was impregnated by her rapist until Judge Rustan issued an injunction at the behest of the Pro-Vida group.

Macri, according to municipal legislator Maria Elena Naddeo, shared information about the case at a dinner with business leaders, enabling pro-life activists to seek the court injunction.

The conservative mayor violated city ordinances and a clause of the Argentine penal code that mandates a fine and up to three years of exclusion from public office for an official who shares a "secret whose dissemination can cause harm," the complainants said.

Around 500,000 abortions are performed in Argentina every year, according to official estimates. EFE