Key developments on Oct. 16:

• Drone attack sparks fire at industrial facility in Russia's Surgut district, governor says
• Pope Leo urges Putin to allow humanitarian aid, evacuations from Russian-occupied Oleshky
• Ukrainian military strikes million-dollar Russian radar in Krasnodar Krai, General Staff claim
• Zelensky's ask: 300 Patriot

Ukrainian activist and volunteer Serhii Sternenko claimed the facility was the Surgut Condensate Stabilization Plant, which processes gas condensate and produces petroleum products.

'Striking such systems reduces the enemy's ability to monitor airspace and detect aerial assets in time. The estimated cost of the radar station is about US $100 million,' the General Staff said.

According to monitoring channels ExileNova+ and SuperNova+, Russian technology giant Yandex's data center in Vladimir Oblast, around 500 kilometers (310 miles) from the Ukrainian border, was targeted in the overnight operation.