An injured woman is carried on-board an ambulance after a subway derailment in Spanish city of Valencia, July 3, 2006. The death toll rose to 41 while another 47 more people injured, officials said on Monday. (Xinhua Photo)

The black box recorder from the subway train that derailed in the Spanish city of Valencia on Monday is being analyzed to see if speeding caused the accident which left 41 people dead, officials said.

"The black box has been found and is in the hands of our agents, who are in the process of analyzing it," said Jose Ramon Garcia Anton, head of infrastructure for the Valencia regional government.

The crash happened on Monday on the No. 1 line of Valencia's subway system between Jesus station and Plaza de Espana station.

Forty of the 41 people killed in the crash have been identified. The driver was among the dead. A further 47 people were injured in the incident, two seriously.

Officials in Valencia had said earlier that the likely cause of the derailment could be a combination of speeding and a wheel coming off on a bend.

Meanwhile, Spain's Prime Minister Jose Rodriquez Zapatero cut short a visit to India to travel to Valencia, and three days of mourning has been declared.

Valencia, around 350 km from the capital Madrid, is one of Spain's biggest cities with a population of 800,000.

Editor: Yan