BARCELONA, Dec 7 (Reuters) - Some 28 migrants fled from a plane that made an emergency landing in Barcelona on Wednesday when a pregnant woman faked going into labour during a Morocco to Turkey flight, before police rounded up half of them, the Spanish government said.After landing at El Prat airport, the woman was checked at a hospital and found she had not gone into labour, the government said.It said five were put back on the plane and eight others would be deported to Morocco.The plane had a total of 228 passengers from Casablanca to Istanbul, where it landed at 1:10 p.m. local time (1010 GMT) after a delay of over three hours, according to Flightradar.com.Just over a year ago, a group of passengers from Casablanca to Istanbul fled their plane on to the runway in the Spanish island of Mallorca following an emergency landing under a false pretext and 12 of them were arrested, while 12 others escaped."