Venezuela border closing hurts innocent people: Colombian president
Maduro closed the crossings on Wednesday after a shootout between smugglers and troops left three soldiers wounded. He declared a 60-day state of emergency in five border municipalities on Friday.
"We're willing to pursue the criminals to find those responsible for the attack," Santos told journalists on the sidelines of meetings with regional officials.
"I'll see if I can speak to President Maduro, to see if we can solve this situation as quickly as possible because innocent people are the ones suffering."
The 2,219-kilometer (1,379 mile) border shared by the two countries is frequently traversed by smugglers and illegal armed groups.
(Reporting by Monica Garcia, Writing by Julia Symmes Cobb; Editing by Dominic Evans)