saying officers faced aggressive resistance from protesting truck drivers. more than 170 people have been arrested and 38 vehicles seized as officers, some on horseback, continued the second day of a massive crackdown which has become one of the country's biggest ever policing operations. reports from niger say an air strike by the military from neighbouring nigeria has killed seven children by mistake. the governor of the maradi region told the bbc that five others had been wounded in the strike. nigerian officials said an investigation was underway. the two countries have been conducting joint military operations against armed gangs responsible for kidnappings in the region. the first body has been found on a ferry that caught fire near greece on friday. another ten people are unaccounted for. all the missing people are thought to be lorry drivers from bulgaria, greece, turkey and lithuania. 280 passengers and crew were evacuated from the euroferry olympia after a fire broke out on friday.