The Mexican government should completely clear up the incidents that occurred on Dec. 1, when President Enrique Peña Nieto was inaugurated, especially allegations of torture, Reporters Without Borders said Monday, adding that the release of two photographers jailed during the protests was a welcome step.

"Press photographers Mircea Topoleanu and Brandon Daniel Bazan were finally released yesterday after being held since their arrests while covering major clashes between police and demonstrators in Mexico City during President Enrique Peña Nieto's swearing-in on 1 December," the Paris-based press rights group, known as RSF, said.

Topoleanu, a 32-year-old Romanian who works for Voices Mexico magazine, was arrested as he watched a protester being detained.

The photojournalist was beaten, thrown to the ground and stripped of his equipment by police officers, RSF said.

Bazan, a 19-year-old photographer employed by Cafe MX magazine, was arrested along with a group of young people he had photographed as they marched peacefully in the capital.

A judge dropped all charges and ordered the release Sunday of 55 of the 69 people arrested in connection with the inauguration day protests in Mexico City.

"We obviously welcome the decision to abandon proceedings against most of those arrested on 1 December," RSF said. "But the release of the photographers must not eclipse the fact that the president's inauguration was marred by the use of heavy-handed police methods to suppress the right to demonstrate and, in some cases, the right to report the news."

The press rights organization called on officials to order a probe of the incidents and allegations of human rights abuses.

"A full investigation must be carried out into these events, in particular, the cases of torture reported by the Federal District Human Right Commission," RSF said.

Television news reports showed images of police beating the protesters, many of them young people who have been identified publicly by their families and defended as non-violent individuals.

The Federal District Human Rights Commission, or CDHDF, released a report in which it cited "consistent information on 22 cases of people who were arbitrarily arrested" by Mexico City police and of four people who were tortured by officers. EFE