Dmitri and Natalia Protasevich have expressed deep concern over their son's well-being while in prison, and believe he is being tortured by the government.
"We urge you to help us, so that all the innocent people can be released from prison," the couple told the newspaper in a message directed at Merkel. "They urgently need help, because they are exposed to violence and sadism on a daily basis."
Protasevich and his Russian girlfriend, Sofia Sapega, were detained by Belarusian authorities on May 23 after their Ryanair passenger plane was forced to land in Minsk, the capital of Belarus. The Ryanair flight was traveling from Athens and was set to land in Lithuania. However, Belarus eader Alexander Lukashenko scrambled a fighter jet to force the airliner to land in Minsk.
The blogger's parents called on Merkel to stop Lukashenko and said innocent lives, including those of children, are being taken by his government.
Merkel has called on Protasevich and Sapega to be released. She has also called explanations provided by the Belarusian authorities who say the plane needed to be grounded due to a bomb threat from Palestinian Hamas "completely implausible."
The EU has applied new sanctions on Belarus since Protasevich's arrest, banning Belarusian carriers from flying over EU airspace or using EU airports. Multiple European airlines, such as German carrier Lufthansa, have also decided to stop flying over Belarusian airspace.
The European Commission is also planning additional sanctions on Belarus, targeting Belarusian judges, lawmakers and executives, Bloomberg has reported.