[Slovakia's Prime Minister Robert Fico speaks during an interview with Reuters in Bratislava]By Tatiana Jancarikova and Jan Lopatka BRATISLAVA (Reuters) - It is likely the numbers of migrants coming to Greece from Turkey will not drop in the coming weeks despite a European Union agreement and the EU should take steps to prepare new options, Slovak Prime Minister Robert Fico said on Monday. Fico, who has made a tough stance on migration the cornerstone of his policies before a March 5 election, told Reuters the government was prepared to erect mobile barriers on borders with Austria and Hungary to direct the flow of migrants he fears will rise soon. Slovakia has so far seen only a trickle of migrants across its territory on their way from Syria or Afghanistan to western Europe.