Miracles are real. We that are Christians know this and most of us have experienced DIVINE miracles. They are real and of God. But there is also a demonic power at work in our world today that is deceiving people. They are performed by false prophets who have been empowered by Satan for the purpose of deceiving people into believing in false religions, cults and non-christian views.
Be careful when you see or hear of a miracle that has taken place. It maybe of God, but it could also be of Satan. (1 John 4:1-3)