JAKARTA, April 22 (Xinhua) -- Indonesian police have beefed up precautionary steps for possible attacks after the multiple attacks in Sri Lanka on Sunday left at least 290 people dead and hundreds more wounded, a police officer said here on Monday.

Monitoring and surveillance on the movements of "sleeping terrorist cells" across the country have been intensified, national police spokesman Brig. Gen. Dedi Prasetyo said.

Mapping of the presence of the cells, including profiling and identification of the networks, has been carried out since the crackdown against militants in March in Sumatra and Java Island, according to the spokesman.

"The strengthening of the efforts to monitor the sleeping cells persistently gets underway. It was staged by the anti-terrorist and radicalism task force, anti-terror squad of Densus 88 and other stakeholders," Prasetyo said.

The spokesman emphasized that the police keeps on alert over the potential of any disturbance on the security, particularly those plotted by militants.

In recent months, the Indonesian anti-terror squad has nabbed 12 alleged militants in its crackdown against the terrorists in Sibolga town of North Sumatra province, Lampung province and West Java province.