MINEOLA – An investigation is underway into a fatal fire in Mineola. Fire Marshall David Madsen said it was reported around 11:00 Monday night at the Mineola Motor Lodge on West Broad Street. Initial reports are a Hispanic male was killed and his body has been sent to a Tyler lab for autopsy. His identity has not been released at this time. The cause of the fire has not yet been determined.

Based on that paragraph can we conclude that this sentence is true?
Tyler lab knows the cause of the fire.

pick from the following. (I) Yes; (II) It's impossible to say; (III) No;