RIO DE JANEIRO - Brazil’s military will reinforce police providing security at hotels and training camps for the teams playing in the World Cup, the defence ministry said on Thursday.

A defence spokesman said President Dilma Rousseff’s office had authorised the decision on Monday – the same day 200 striking teachers surrounded the Brazilian team’s bus for nearly half an hour and blocked it from carrying the squad to their first day at base camp.

A 30-troop infantry platoon was sent on Wednesday to Brazil’s base camp in Teresopolis, outside Rio de Janeiro, to reinforce security for the team, which plays the opening match of the tournament against Croatia on June 12.

The army will also be charged with anti-terrorism operations, border security and protecting strategic infrastructure during the tournament, including ports, airports, power stations and water supplies.

Brazil has seen a series of strikes and demonstrations in the run-up to the tournament, though they have been smaller than the mass protests that shook the country a year ago during the Confederations Cup, a World Cup dress rehearsal.

The protesters are angry over the more than $11 billion being spent on the tournament, saying the government should prioritize health, education and transport instead.

Brazil has mobilized 57 000 troops to provide security during the World Cup. About 21 000 of them will be on standby in case state police need reinforcements.

In all, the country will have 157 000 soldiers and police ensuring security, officials say.