Yes if you make accusations then you just get accusations raised against you. They're trying to do it diplomatically and let the investigative processes take their due courses without inflaming the situation.
But we all know it was them.
They are (both clubs) partly trusting the fans to read that and know what/who it refers to. At least as immediate reaction, till more can conclusively be said. Ignorong it or waiting would be wrong. Lashing out partially likewise. This is an interim middle ground.