An alien spaceship opened a wormhole to a location in near-Earth orbit just long enough for a ship to come through. The ship intended to make public, peaceful contact with Earth upon arrival, but experienced trouble in transit such that it's passengers were using the escape pods immediately after exiting the wormhole. The abandoned ship fell to Earth over the next few minutes.
In the story that I'm writing, only a few parties noticed the ship falling to Earth: namely, a handful of major world governments. What would have prevented many people on Earth have seen the shuttle fall, and making it public news? It's a few hundred meters long, so my understanding is that any lucky person with a decent telescope should have been able to see it, especially as it crashed down.
I'm willing to accept that the escape pods might be unnoticed thanks to some kind of alien stealth (if you have to emergency eject, chances are you also want to hide where you're going from someone). However, the original ship was definitely not using any kind of stealth.