Militant Aymen Smiri blew himself up on Tuesday evening after security forces surrounded him in the Tunisian capital's Intilaka neighbourhood.
There were no other casualties, officials confirmed.
"Following a long chase, special forces surrounded the terrorist," the interior ministry said in a statement. "When forces began shooting, he blew himself up with an explosive belt he was wearing."
It's the third such incident within a week, which comes months ahead of an election and at the peak of the tourist season.

Zohran Mamdani wins NYC mayoral race, capping meteoric rise
Kalmaegi death toll climbs to 66 as Philippine survivors confront destruction
China's Shenzhou-20 return mission delayed due to space debris impact
At least 7 dead after UPS plane crashes in Kentucky, erupts into ball of fire
