CAIRO, Nov. 30- Three people including an army general were killed and at least 28 wounded on Friday in militant attacks, some claimed by a group loyal to Islamic State, and clashes at Islamist protests around Egypt, security sources and health officials said.

Police were out in force at the demonstrations, organised by a hardline Salafi group calling for removal of the government of President Abdel Fattah al-Sisi, the ex-army chief who led the overthrow of elected Islamist president Mohamed Mursi in July 2013.

In Matariya, focal point for protests in Cairo, a civilian died before the gathering was dispersed, security sources said.

Hours before, an army brigadier general was killed and two soldiers wounded when gunmen in an unmarked car fired on a parking lot in nearby Gesr al-Suez, they said. One soldier later died.

The demonstrations were small. Reuters witnesses saw just 100 or 200 people in Matariya.

The Interior Ministry said it thwarted 10 planned bombings and arrested 224 people nationwide on Friday.

One officer was shot in Alexandria and a bomb injured four police in the Nile Delta town of Sharqiya. In Al-Arish, in largely lawless northern Sinai province, a bomb wounded six policemen, security sources said.

Violence also erupted in Beni Soueif, a southern town, and Kafr Sheikh in the Delta, they said.

Ansar Bayt al-Maqdis, Egypt’s most active militant group, appeared to take responsibility for some attacks via what claims to be its official Twitter account.