Colombian authorities have said security measures are in place for a two-day summit of Pacific Alliance later this week in Cali, capital of the western province of Cauca.

Colombia has deployed more than 3,000 police officers to ensure the safety of the heads of state and other top officials at the event, and 180 motorbikes, 60 patrol cars, a helicopter and an unmanned aircraft are used for the mission.

Leaders to attend the summit, slated for May 21-23, include the presidents of Mexico, Peru, Chile, and Colombia as well as top officials from some other countries.

Also attending the summit are observers from Panama, Japan, Spain, New Zealand, Guatemala, Uruguay, Costa Rica, Canada and Australia, and 200 international delegates and journalists.

The Pacific Alliance, formally launched on June 6, 2012, groups Chile, Colombia, Mexico and Peru, which jointly represent about 36 percent of Latin America GDP.

Leaders from the bloc have had six top-level meetings to seek new economic opportunities and greater cooperation with Asia-Pacific countries.