West Bank checkpoints temporarily closed until after Day of Atonement ends; 300 policemen deployed in Acre; train and bus services ceased.
Security and rescue forces will be on high alert during Yom Kippur which begins Friday afternoon and will end Saturday at dusk.
Security crossings into Israel from the West Bank were temporarily closed Thursday night and will open again at midnight on Saturday in accordance with security assessments adopted by the IDF.
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As many as 300 police officers are expected to be deployed on the streets of Acre from Friday afternoon until Sunday morning, Israel Radio reported.
All the main entrances to the city will be blocked from the east.
The measures are being taken following violent riots that took place in the city two years ago on Yom Kippur.
Train services throughout the country ended at 11:30 a.m and Egged bus services stopped running at 2:00 p.m. Bus services will resume at 7:30 pm on Saturday.
The fast will begin at at 5:07 p.m in Jerusalem, 5:22 p.m in Tel Aviv, 5:14 p.m in Haifa and 5:25 p.m in Beersheba and will last 25 hours.