Members of the Mexican Gendarmerie take part in the search for 43 missing students on the outskirts of Cocula, Mexico, on October 19, 2014 (AFP Photo/Ronaldo Schemidt)
Carola Sole of Iguala de la Independencia (Mexico) (AFP) reported that Mexican authorities have intensified efforts to find 43 students who disappeared more than three weeks ago, using dogs, horses and divers to broaden the search.
About 50 vehicles, carrying some 200 members of a special division of the federal police, arrived in Xonacatla, which is located close to the town of Iguala, where the students disappeared on September 26.
"We are scouring all places that could be of interest," said Manelich Castilla, commissioner for the police division, known as the Gendarmeria Nacional, which is leading the operation.
Authorities said the search had been expanded to include bodies of water such as lakes and ponds, as well as in the numerous mines and caves of the mountains around Iguala.
More than 1,200 security forces are now looking for the college students around Iguala, a town of 140,000 inhabitants.
Authorities say Iguala's police force shot at buses carrying the students on September 26 and handed them over to officers in the neighbouring town of Cocula, who then delivered them to the Guerreros Unidos drug gang.
Six people died and 25 were wounded that night.