The two played together when Miazga was on loan at Nantes earlier in the season.
And the youngster has spoken about the impact the incident had on his life.
"He had a break [after signing], so he came to Nantes to say goodbye to everyone. I didn't see him because I was injured," Miazga said to Goal.com.
"The next day, I was texting my buddies at Nantes, he told me the news.
"I was in shock. The plane was gone, then there was the search. I was very, very sad for everyone who knew him. You never want to see this happen in football or life in general. I knew him for six months, we lined up together in the same shirt, fought together, travelled together, ate together, trying to win football matches.
"We spoke French, and he let me practice my French. It is very, very sad. Rest in peace. No one wants to see it happen, especially to someone you know. You would never think it could happen in 2019. A good guy, a good player which was shown by his big-money Premier League transfer.
"He had a nose for goal, a fox-in-the-box type. Great in the air, I went against him in training. I pray for him and his family."