The two rival Palestinian factions have failed to heal their political disputes since Hamas fighters expelled Fatah from Gaza in a short war in 2007
Home Secretary Priti Patel will speak to French Interior Minister Gerald Darmanin later today.
"We're prepared to offer support on the ground, we're prepared to offer resources," Foster told BBC TV. "We're prepared to offer, literally, people to go there and help and assist the French authorities."
"We're clear: we don't just see this as an issue that France needs to deal with, but one that we want to work together with France and our wider European partners... to break the business model of these gangs," Foster said.