Fifteen policemen were taken to hospital in South Sinai with breathing problems after Egypt's paramilitary force used tear gas against officers striking over cuts to their monthly holidays, local media reported.
The injured policemen were taken to hospital in the Red Sea resort of Sharm el-Sheikh, a medical security source was quoted as daily telling Al-Masry Al-Youm's website.
Personnel and two vehicles from Egypt's General Security and Central Security Forces were deployed to break up the strike, the daily said.
The paper quoted South Sinai's security chief Ahmed al-Tayel as warning that police officers who did not turn up for work would be punished.
The strike began on Monday after the Egyptian government decreed that police in the province must work 20 days a month with 10 days holiday as part of efforts to tighten security in the restive Sinai Peninsula, according to Tayel.
Tayel pointed out that Sinai police officers receive bonuses of 300 percent, Al-Masry al-Youm reported.
South Sinai is Egypt's least populous province and is located in the southern part of the Sinai Peninsula. It borders the restive North Sinai province, where security forces have been battling an Islamist insurgency in recent years.
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