Simplify the following text for a Grade 10 native English-speaking person.
Original: The Indian massacre of 1622 ( also known as the Jamestown Massacre ) was an event where around 347 people were killed in the Virginia Colony of North America on Good Friday , March 22 , 1622 .
Simplified: The Indian Massacre of 1622 occurred in the Colony of Virginia , in what now belongs to the United States of America , on Friday , March 22 , 1622 .