The death toll from the Easter Sunday attacks on churches and hotels in Sri Lanka has risen to 359.
Updating the toll, police spokesman Ruwan Gunasekera said 18 suspects were arrested on Tuesday night, raising the total detained to 58.
This comes as Sri Lankan President Maithripala Sirisena vowed to overhaul state security, announcing changes to the heads of defence forces "within 24 hours".
On Tuesday, Prime Minister warned on Tuesday that several suspects armed with explosives were still at large.
Earlier, the IS militant group claimed responsibility for the attacks, without giving any evidence to support their claim.

Bus-truck head-on collision in Parana, Brazil kills at least 21
At least 9 killed in hotel fire in India's Kolkata
Russian drone attacks kill five in Ukraine's Kherson, governor says
Ebola cases in Congo exceed 5,000, government data shows
8 Israeli airstrikes hit Syria's Abu al-Duhur airbase, state TV reports
