Police in Tosu, Saga Prefecture, said Wednesday they have arrested three youths, one aged 19, and two aged 18, for throwing eggs at students from Nepal, Vietnam and Sri Lanka.

According to police, the three youths threw eggs at the foreign exchange students from a car on numerous occasions, the most recent incident occurring at around 9:30 p.m. on May 20, NTV reported. Police said two of the suspects have admitted their guilt, while the third said he didn't know anything about it.

Police said that since last December, there have been 19 cases of foreign students being pelted with eggs and mayonnaise, as well as being hit with gravel fired from an air gun and they are questioning the three youths about their involvement in those incidents.

All the students were studying at a Japanese language institute in Tosu.

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