Police say a 2-year-old girl is in critical condition after being shot by her 4-year-old brother at a Las Vegas home.

Police spokeswoman Barbara Morgan says officers were called about 8:30 p.m. Thursday and told that a toddler had been shot at a house, The Las Vegas Sun reports.

The girl was taken to University Medical Center with a head wound.

Police were investigating how the boy got the gun. They say the father was home at the time.

The shooting came less than a week after a 5-year-old boy died after shooting himself in the head with a handgun inside his father's vehicle outside a Las Vegas pharmacy. That father, 31-year-old Alex Kopystenski, has been charged with felony child endangerment.