A US congressman has posted a picture of himself and others smiling and holding guns around a Christmas tree, just days after four teenagers were killed in a shooting at a Michigan high school.

A five-year-old child was shot and killed by a teen who was filming a social-media video with friends, police said.

Two people were killed and four others, including a police officer, were injured on Monday in a shooting at a shopping center in Boise, Idaho.

A shooting incident has left three US Postal Service employees at a Memphis postal facility dead, authorities said.

A shooting on Thursday in East St. Louis, Illinois, has left multiple victims.

The incidents of gun violence have seen an alarming surge in the US in recent years, reigniting the debate over gun control laws and misuse of lethal weapons.

Despite the ever increasing number of casualties and fatalities due to gun violence and easily circumvented firearms legislation, the proponents of gun rights and gun control often fail to find common ground.