Mexican police and immigration agents intercepted 75 undocumented Central American migrants who had hopped aboard a northbound freight train en route to the United States, authorities said.

The 70 Hondurans, three Guatemalans and two Salvadorans were detained at a train station in the central state of Hidalgo.

Every year, an estimated 300,000 Central Americans undertake the dangerous journey across Mexico in a bid to reach the United States. The trek is a dangerous one, with criminals and corrupt Mexican officials preying on the migrants.

The perils were highlighted last August, when 72 mainly Central American travelers were waylaid and massacred in the northern border state of Tamaulipas.

Authorities blamed the bloodbath on Los Zetas, Mexico's most brutal drug cartel.

More than 11,300 U.S.-bound migrants were kidnapped in Mexico during the April-September period of 2010, according to figures compiled by the independent National Human Rights Commission.

Gangs typically abduct the migrants, force them to provide phone numbers for relatives - usually in the United States - and then contact the captives' kin to demand ransoms for their release.