A tail section of a BUK missile impacted the ground in a residential area in Makeevka, Eastern Ukraine at February 1.
According Pro Russian press the missile was shot by Ukraine Army at a OSCE unmanned drone. OSCE uses drones to observe military actions in Eastern Ukraine.
The location the missile was shot from however indicates separatists shot the BUK missile.
However the OSCE monitoring missing in Ukraine reported on Twitter none of their drones was a target. Nor any wreckage of a drone was found.
A more likely target could be a United States Air Force RQ-4 Global Hawk UASs (Unmanned Aerial Systems) drone. These fly at around 15000 and can easily be reached by BUK missiles. These do operate above eastern Ukraine as this post shows.
Всупереч повідомленням деяких ЗМІ, останнім часом жоден з безпілотників СММ #ОБСЄ не зазнавав атак.
— OSCE SMM Ukraine (@OSCE_SMM) February 1, 2017
Many photos showing the wreckage are displayed here.
This video shows the remains.
A user on Twitter did some geolocation which shows the direction the BUK missile was launched from. Reports say the missile was launched from the YaKKhZ factory (location here) which is about 3 km from the place where the missile impacted. The complete area is under control of the separatists supported by Russia.
At Russian forum mh17.webtalk.ru a photo of the BUK wreckage was shown. It shows a serial number which looks to be in the same range as a BUK missile which was handed over to the Joint Investigation Team investigating MH17.
However there does not seem to be a relation between the two numbers.
Smolensk website has some additional info like the exact location the missile landed.
The serial/batch of the crashed BUK missile is 9M38M188 <unsure likely 7>220
The serial of the JIT supplied BUK missile is 9M38M1887221023
One of the photos published by JIT shows a container to store a missile in with a serialnumber ending with 88563784
The structure of the numbering is yet unknown. Most likely the structure is
where type is either 9M38M1 , 9M317
yy is the year of manufacturing
xxxxx is a unique serialnumber
This post has some more photos showing serialnumbers.