The posters and graffiti appeared at five places in Sabathu Cantonment area in Solan district, about 70 km from here, with one threatening bomb blasts from Himachal Pradesh to Nepal using washing machines andtelevision sets.
Police rushed to the spot and launched probe after registering an FIR under relevant sections of the IPC.
"Many people have been questioned in this regard but so far, no arrest has been made," said Additional Superintendent of Police Manmohan Singh, who rushed to the spot immediately after receiving the information.
"It seems to be some mischief, but we are not taking it lightly and probing thoroughly to identify the accused," said a senior police official.
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Earlier, the walls of a temple at Dharampur, 15 Km from Sabathu were defaced, with inscriptions like "ISIS coming soon" in English and Arabic.
The police is trying to establish link between both the incidents.
In December last, 23-year-old Abeed Khan from Bangalore, with alleged IS links, was arrested by a National Investigation Agency (NIA) team from a church in Banjar in Kullu district. He was living with fake identity.
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