Zoo officials in San Diego, California, say a giant panda was born at the San Diego Zoo on Tuesday, making it one of only about 10 giant pandas in the United States.

The officials say the mother, a 13-year-old giant panda pregnant with twins, gave birth to one cub, but the other died in the womb.

It is the second panda birth in less than a month at a U.S. zoo.

The first was born three weeks ago at Washington's National Zoo.  On Tuesday, veterinarians determined that cub is male.  The cub's parents are being loaned by China under a 10-year agreement. 

Giant pandas are endangered with a total population of 1,600, both in captivity and in the wild.

Some information for this report provided by AFP, Reuters.