Financial dealings of the three have been under the scanner of the agency for quite some time, sources in the Income Tax said.
"Searches are being conducted simultaneously at their houses, relatives' houses, resorts and other establishments in different parts of the state. Questioning of the persons is required to unearth their dubious deals and source of their income," the sources, on condition of anonymity, said.
They said the agency officials recently had taken notice of a big fat wedding related to one of them in Kollam.
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