Planned Parenthood canceled a Detroit event scheduled Monday, just days after last week's shooting massacre at Colorado clinic.
The attack in Colorado Springs left three dead and several others injured.
In an email, Planned Parenthood spokeswoman Desiree Cooper said the cancelation was "not because of any specific security threats or concerns in Michigan."
The event at the Detroit Health Center was expected to discuss Planned Parenthood's role in the fight against AIDS, ahead of World AIDS Day on Tuesday.
U.S. Rep. Brenda Lawrence was scheduled to appear.
"As everyone else is, we are grieving the unfortunate deaths of individuals based on what I feel was an act of terrorism," Lawrence said.
Lawrence said she plans to reschedule the appearance.