Although Scripture does not explicitly state this, many commentators feel that this could be true, at least for believers. Certainly, given the innumerable number of the angels and God's love for His own people, it would be a logical conclusion. Of course, this may also occur among unbelievers when it suits God's purposes.
Angels can touch our lives at any moment.
We can rest assured that should angelic intervention be necessary to fulfill God's purposes, it will happen. Modern fascination with UFOs has grown by leaps and bounds since the first sighting by Kenneth Arnold in 1947. Most people think that UFOs are either hoaxes, misinterpretations, hallucinations, or actual visits from extraterrestrial civilizations. Probably the last conclusion they would arrive at is that UFOs are an angelic phenomenon, let alone a product of the power of fallen angels. But this is exactly what they are.