The US State Department is urging increased caution if you plan to travel to Sri Lanka because terrorist groups are continuing to plot possible attacks.

Terrorists in Sri Lanka killed nearly 300 people in a series of attacks on Easter Sunday. So far, 24 people have been arrested.

“Terrorist groups continue plotting possible attacks in Sri Lanka,” a travel advisory from the State Department warned.

“Terrorists may attack with little or no warning, targeting tourist locations, transportation hubs, markets/shopping malls, local government facilities, hotels, clubs, restaurants, places of worship, parks, major sporting and cultural events, educational institutions, airports, and other public areas,” the warning continued.

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The State Department urged people who still intend to travel there to “be aware of your surroundings when traveling to tourist locations and crowded public venues” and “monitor local media for breaking events and adjust your plans based on new information.”

Australia and Ireland have also issued similar warnings to their citizens about traveling to Sri Lanka.

Yahoo News reports that the US embassy in Colombo said it would remain closed to the public on Monday and Tuesday, but will continue to provide citizen services.