After the game Real Madrid's hero Sergio Ramos dedicated his goal to the families of those who died in the Chapecoense plane crash.
"This point and this gol are for the families of Chapecoense.#ForcaChape"
Alongside a picture of Real Madrid players celebrating, he also tweeted: "Until the final whistle. Always until the final whistle."
Barcelona striker Luis Suarez: "I think we were the better side and we did everything possible. Now we have to be strong and keep on."
Viv: Fair share of the points in El Clasico. However, it is still too early to call though Real Madrid look in control at the moment!
Jawad Kayani: Ramos has rescued Real once again. Surely one hand on the title after this draw for Real Madrid.
That was the first time Luka Modric has assisted a Sergio Ramos goal since the 2014 Champions League final. Ramos made it 1-1 against Atletico Madrid in injury time, and Real went on to win 4-1.
Today was his fourth El Clasico goal, not bad for a centre-back.Copyright: Getty Images
Andres Iniesta tried 27 passes after he came on, with 26 successful. That's a 96.3% success rate. How Barcelona have missed him.
His passing accuracy was higher than everyone else who tried more than two passes. Honourable mentions for Real Madrid midfielders Luka Modric (95.2%) and Isco (95.1%).
Barcelona only had two shots on target all game, to Real Madrid's five. They also had fewer shots off target (6-4).
They did edge possession 55%-45% though. Last weekend against Real Sociedad was the first team Barcelona were out-possessioned by this season.
No need to tell me out-possessioned isn't a word. It is now.
Hugh in France: Cometh the last minutes, cometh the Ramos. Thoroughly deserved for Real.
Let us know what you thought of that. Do you think Real Madrid will go on to win the title now? Or far too early for that kind of chat?
That's Barcelona's fourth domestic draw in a row now. They remain six points behind leaders Real Madrid (with a worse goal difference too).
Real Madrid remain unbeaten in all competitions this season thanks to Sergio Ramos' late header.Copyright: AP
Andy West at the Nou Camp: "It's the right result. Real were better in the first half, Barca in the second. Obviously Barca will be disappointed after losing the lead so late, but they can't claim it was a great performance. A game to show how much room for improvement there is for both teams."Copyright: Getty Images
An absolute sickening blow for Barcelona. It's definitely advantage Real Madrid in the title race now - they're still six points clear.
Barcelona almost win it in the last second. Keylor Navas punches the ball away and he's off his line. Barca take a shot and it's cleared off the line by Casemiro.
Andy West at the Nou Camp: "Sergio Ramos and last-minute headers... don't mention them to Atletico Madrid, that's all I can suggest. Keylor Navas racing the full length of the pitch to join the celebrations shows how much that means to Real.
"The atmosphere has gone as flat as a pancake... or it had done until Ronaldo's rolling around attempted to waste some seconds. Kitchen sink time for Barca now. Pique header to win it...? "Copyright: Getty Images
There are three minutes added on. Is there time for a late winner for either side? What late drama.
Scenes. It's another header and Real Madrid are level in the last minute. Captain Sergio Ramos finds space in the Barcelona penalty area and heads home Luka Modric's free-kick.
Real remain six points clear as things stand.Copyright: AFP
This was almost Real Madrid's moment. Marcelo's cross is headed across goal by Cristiano Ronaldo and Jordi Alba gets it clear. Ronaldo could have turned that home himself though. Not sure why he didn't. Very unlike him.Copyright: EPA
Sergio Ramos almost levels for Real Madrid but heads over from close range. A huge moment in the season?
Meanwhile, Neymar comes off for midfielder Denis Suarez for Barca.
Andy West at the Nou Camp: "Mariano scoring would be quite a story. He's barely played for the first team but did get a hat-trick in the midweek cup win over Cultural Leonesa. He's in the squad because Alvaro Morata is injured."
Real Madrid make their final change as fringe frontman Mariano Diaz comes on for midfielder Mateo Kovacic.
Barcelona midfielder Sergio Busquets dives in on Marco Asensio and enters the booking club.Copyright: EPA