Kill both commands that run simultaneously in bash

I want to run two commands simultaneously in bash script (one of them is another bash script) and I need both of them to stop when I press Ctrl+C. My bash script now is:

#!/bin/bash

./command1 &

exec "/path/to/bash2" 

and in bash2:

#!/bin/bash

[..]
python run.py

Should I add a trap to kill both commands? If so, adding the following in bash did not help

trap killgroup SIGINT

killgroup(){
  echo killing...
  kill 0
}