Summertime activities in two states erupted into summertime violence this weekend.

An altercation at a Juneteenth event in Round Rock, Texas late last night left two people dead and six others wounded, two of them children.

Police said the two dead weren't involved in the dispute that led to the shooting.

And nine people were wounded in a shooting at a suburban Detroit splash pad park where families had gathered in the summer heat.

Two brothers, Zayden four years old, and their mother remained hospitalized.

The gunman later apparently killed himself.

Police said the incident appeared to be random at that the suspect

had a history of mental health challenges. In Russia, state media says security forces stormed

the detention center after inmates took two guards hostage.

It happened in southern Russia.

Several of the inmates involved have been accused of links to the Islamic State.

Local news outlets say some of the prisoners were killed.

This is the second deadly attack in Russia this year linked to the Islamic State.

In March, gunman killed 145 people at a concert hall in suburban Moscow.

And an oil spill at one of Singapore's most famous beaches

is raising environmental and economic concerns.

Cruz tried to contain the spill

after a Dutch flag dredger hit a stationary Singaporean fuel supply ship on Friday,

but ocean currents pushed the oil on shore.

It's closed parts of the beaches on the resort island of Sentosa off Singapore's southern coast.

Still to come on PBS News Weekend.

Graphic novelist Reyna Telgemeyer talks about the effect her books have on young readers and on

...