Bengaluru, Dec 15 (ANI): Police in Bengaluru on Monday said that threats by Islamic State on Twitter about carrying out Sydney-like siege in the city were being taken seriously after an armed man walked into a downtown Sydney cafe, took hostages and forced them to display an Islamic flag, igniting fears of a jihadist attack. Bengaluru police commissioner MN Reddy said they were investigating threats by Islamic State militants, who have warned of taking Bengaluru hostage. Meanwhile, Reddy said that they had sent a notice to Twitter Corporation in India regarding information on a company executive suspected of operating a pro-Islamic State Twitter account. Police on Saturday arrested a company executive suspected of operating a pro-Islamic State Twitter account that pumped out a stream of updates on the violent group's military campaign from his base in Bengaluru.