India, June 14 -- Shakira fans were left furious after her Friday night concert at the Alamodome in San Antonio was postponed at the last minute due to reported structural issues.

Before the postponement was announced, many concertgoers shared images and videos of long lines outside the stadium under blistering heat. Fans reported being held outside for hours without being allowed to enter.

"One hour in line with temperatures over 32 Celsius (90 Fahrenheit), people fainting and @Alamodome and @shakira doesn't care at all about the fans," one attendee tweeted.

Another added, "Worst concert experience ever #shakira. So this crowd has been waiting over an hour and a half. But the #alamodome refuses to open the gates. People are passing ou...