The Italian Parliament gave the go-ahead on Wednesday to a naval mission aimed at boosting the Libyan coastguard in its fight against human traffickers and further reducing the number of migrant arrivals on Italy's coasts. <br/><br/>Defence Minister Roberta Pinotti said Italy would provide technical support without infringing on the crisis-hit country's sovereignty but would not take part in a hostile naval blockade to prevent the departure of migrant boats. The number of arrivals last month was down dramatically on the same month last year. <br/><br/>Italy's Prime Minister Paolo Gentiloni announced a plan last week to deploy vessels in Libyan territorial waters, saying Libya's UN-backed unity government chief Fayez al- Sarraj had asked for Rome's assistance.<br/><br/>Some 600,000 mostly African migrants have arrived in Italy from Libya since the start of 2014.