Here is a template letter to give you some ideas when writing your letters.

Dear [recipient's name]

I heard about your situation and wanted to write to let you know that you are in my prayers. Although we have never met, we are united as brothers and sisters in Christ.

I cannot imagine what it must be like to have to endure your sufferings. But I know that the Lord is with you - even in the hardest times. I pray that you will know His presence and His peace everyday. Keep looking to Him and trusting in Him, for He is a faithful God.

"God is our refuge and strength, an ever-present help in trouble." - Psalm 46:1

With love in Christ,

[You name]

[Your country - optional]