Bolivia's government urged patience and caution Sunday following a referendum on President Evo Morales' bid to seek a fourth term, calling it a tie and saying it was too early to call.

"We are really talking about a dead heat at the moment. So it would be better to hold your enthusiasm and calmly wait for results," Vice President Alvaro Garcia told reporters. "All your celebration may well turn into weeping."

He did not immediately say what percentage of the vote was counted. But he said media projections signaling a no vote had prevailed could well be wrong.