A blast that shook central Cairo on Friday morning took place near police headquarters, state television reported.
Reuters witnesses heard gunfire after the explosion. State television quoted witnesses as saying gunmen opened fire on buildings after the blast. Smoke was rising over the city centre.
Daily Telegraph journalist Magdy Samaan tweeted this picture:
Radio Sawa correspondent Zaid Benjamin shared this image:
More top news
Leicester City players have been celebrating their Premier League title after Spurs drew with Chelsea on Monday night.
Tonight western and northern areas will remain a little breezy with a few showers at times.
Leicester are Premier League champions after Tottenham conceded a two-goal lead in a bad-tempered 2-2 draw at Chelsea.