A gang of armed smugglers have killed 15 Egyptian border guards near the frontier with Libya, security officials said.
Initial reports suggested up to 10 more guards may have been wounded in the attack.
The attack took place in Wadi al-Gadid governorate, which borders both Sudan and Libya.
Local media said three smugglers were killed in clashes with the guards, Reuters has reported.
More top news
Helicopters are searching for survivors who may be marooned after a weekend of heavy rain.
Thousands of people attended a protest on Copacabana Beach to demand presidential elections as pressure mounts on Brazil's leader to resign.
Brexit on Theresa May's terms could see the UK lose access to a database of information on terrorists and criminals, the Lib Dems have said.