More than 250 people were killed when six bombs exploded at churches and hotels in Sri Lanka with ISIS claiming responsibility.
The Sri Lankan government has now ordered a complete ban on all types of burqas and veils that cover the face.
Sri Lanka remains on high alert a week after the bombings and a statement from the president’s office claimed the ban is a necessary step.
It read: “President Maithripala Sirisena took this decision to further support the ongoing security and help the armed forces to easily identify the identity of any wanted perpetrators.”
The ban on burqas comes into effect on Monday.
Police believe that local extremist group National Tawheed Jamath (NTJ) were involved in carrying out the Easter bombings and it has been claimed they are a branch of ISIS.
The terrorist attack was the most deadly in Sri Lanka since their civil war came to an end in 2009.
Little is known about the NTJ but they have been accused of promoting Islamic terrorist ideology and vandalising Buddhist statues in Sri Lanka.
The Archbishop of Colombo, Malcolm Ranjith, asked for churches to suspend Sunday mass due to the security fears.
He held a special televised service from a chapel at his home which was attended by President Sirisena and Prime Minister Ranil Wickremesinghe.
So far dozens of suspects have been arrested but Sri Lankan authorities believe that other terrorists remain on the loose with explosives.
ISIS have claimed that it was their terrorists who blew themselves up on Friday night after exchanging fire with police in the east of Sri Lanka.
Investigators at the site uncovered more bomb-making equipment capable of causing destruction on a mass scale.