The government has offered the families of employees and volunteers working at the Australian High Commission in Colombo flights out of the country amid continuing advice that further attacks are "likely".
"The travel advice for Sri Lanka was updated on 28 April to reflect a decision to offer dependents of Australian staff working at the Australian High Commission in Colombo voluntary departures to return to Australia," a Department of Foreign Affairs and Trade (DFAT) spokesperson told SBS News.
"There is no change to the level of the travel advice for Sri Lanka, which advises Australians to 'reconsider your need to travel’."
A large number of Australian children of embassy employees currently reside in Colombo.
In the weeks since the attacks, their movements have been restricted and schools have been closed.
"Attacks could be indiscriminate, including in places visited by foreigners," DFAT's Smart Traveller website advises, adding that security has been increased across the island nation.
A Sri Lankan police officer secures the area of a labor day gathering. Source: AP
"We continue to encourage all Australians in or travelling to Sri Lanka to consider the travel advice, including volunteers and volunteer organisations," the DFAT spokesperson said.
There are no plans to alter the usual operations of the Australian High Commission in Colombo.
On Tuesday, Reuters reported that a Sri Lankan government source said a document had been circulated among security agencies instructing all police and security forces to remain on high alert because militants were expected to strike ahead of Ramadan, which begins this week.
The Easter Sunday bombings that targeted a series of churches and high-end hotels across the country last month resulted in the deaths of 250 people - .
On Tuesday, the US ambassador to Sri Lanka said she believed the group blamed for the attacks may be planning further attacks.
“We do believe that the terrorist threat is ongoing and there may be active plotters. Active members of the attack group that carried out the terror attacks on Easter Sunday may still be at large,” Ambassador Alaina Teplitz said.
“We certainly have reason to believe that the active attack group has not been fully rendered inactive. We do believe that there is active planning underway.”
Close to 100 people have so far been arrested in connection to the bombings.
Authorities suspect members of two previously little-known groups - National Thawheedh Jamaath (NTJ) and Jammiyathul Millathu Ibrahim - of carrying out the attacks, although IS has claimed responsibility.
