Gunmen killed three police officers at a checkpoint in the Suez Canal city of Ismailia, the local security directorate said on Saturday.
The attack late on Friday was carried out by two armed men on motorbikes who sprayed the checkpoint with gunfire. One attacker was killed by police and the second fled.
Police are searching for the second attacker.
Unconfirmed reports said that a fourth person was killed.
No group has claimed responsibility for the attack, which bore the hallmarks of operations by ISIS militants who have been fighting the government for years in the north-eastern corner of the Sinai Peninsula on the border with Israel and the Gaza Strip.
Attacks by the Sinai militants were mainly targeted at security forces, minority Christians, residents suspected of collaborating with the military and police or tribesmen openly loyal to the government.
Friday's attack was the deadliest to be publicised since May, when at least 11 Egyptian soldiers were killed in a militant attack on a water pumping station east of the Suez Canal.
The frequency of ISIS attacks has decreased since February 2018, when the military launched a large-scale operation in Sinai, parts of the Nile Delta and the desert border with Libya to the west.
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A lesson in simple, seasonal eating. Wedges of tomato, chunks of cucumber, thinly sliced red onion, coriander or parsley leaves, and perhaps some fresh dill are drizzled with a crushed walnut and garlic dressing. Do consider yourself warned: if you eat this salad in Georgia during the summer months, the tomatoes will be so ripe and flavourful that every tomato you eat from that day forth will taste lacklustre in comparison.
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A delicious vegetarian snack or starter. It consists of thinly sliced, fried then cooled aubergine smothered with a thick and creamy walnut sauce and folded or rolled. Take note, even though it seems like you should be able to pick these morsels up with your hands, they’re not as durable as they look. A knife and fork is the way to go.
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This healthy little dish (a nice antidote to the khachapuri) is usually made with steamed then chopped cabbage, spinach, beetroot or green beans, combined with walnuts, garlic and herbs to make a vegetable pâté or paste. The mix is then often formed into rounds, chilled in the fridge and topped with pomegranate seeds before being served.
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This article is part of a guide on where to live in the UAE. Our reporters will profile some of the country’s most desirable districts, provide an estimate of rental prices and introduce you to some of the residents who call each area home.