According to the search results, there is a state-wide bandh in Karnataka on Friday, September 29, 2023, in protest against the release of Cauvery river water to neighboring Tamil Nadu. The bandh will be in effect for 12 hours from 6 am to 6 pm. Cab aggregators including Ola and Uber have extended support to the bandh and are set to hold a rally from Nayandahalli to Town Hall. The ‘Kannada Okkuta’ said the Karnataka bandh will be successful, and warned the state government against measures to curtail the protests.

It is important to note that the search results are from September 2023 and may not be relevant to the current date of October 18, 2023. It is recommended to check for more recent news updates to get accurate information about the current situation.